Theres two stock answers to this as far as i know:
1. Its 90% rider/10% board, and
2. Better at what?
I dont know how long youve been snowboarding, (ive only been around 40 days myself over 3 years so im not an authority), but i know from my personal experience that when youre learning, your choice of board can and does make a difference.
I learned on a freeride board of all things. I figured i wanted to ride back-country asap, so when i bought my board (and i didnt even think places like this existed so just went with the very little info i could find) i thought i really needed a freeride deck, so grabbed an artec. Its a decision im still not 100% sure id replicate if i could go back. But at the same time, its kind of one im happy with.
You see, i could have got a nice soft 'beginners' deck, as many people would recommend for a beginner, because its more forgiving and thus has a bit of an easier learning curve. The deck i learned on, you couldnt press without seriously straining your quads
It also turned me off of park almost instantly because it just felt so unforgiving.
I learned to ride speed early, i learned to throw out deep carves very quickly, and i learned to deal with natural terrain much more confidently than i think i would have if i just rocked up on blunt or something. Owning that board seriously encouraged me to flirt with off piste before i was really (if im honest), ready for it because thats what the board ultimately wanted to do. It game me a serious crash course in riding aggressively that is now almost the corner stone of the way i ride. If i had a soft board, id be a much more playful rider just because you tend to ride where the boards most fun when youre learning and exploring. However, with the qualifier of number 1 (90/10), you can do everything i did on my freeride on your park deck if you really wanted to, but at the end of the day youll probably feel a bit of a pull towards the area the board seems to like the best.
You can learn on anything, its not a big deal because whatever you learn on, you will find that in a year or two, youll need to learn those skills anyway (or make up for the skills you didnt really focus on while you were learning). This year for example, i bought a sierrascope, and focussed much more on messing around on it. Naturally i did it out of park on natural terrain because thats what im happiest riding and thats where i enjoy riding. But whether thats because i learned on a freeride, or because i wanted to ride there anyway, is kind of chicken/egg. Still, i cant help but feel that it did have an impact of some kind.
As i say though, if i had to go back, im not 100% sure id make the same decision. That board was pretty aggressive, and REALLY unforgiving. If i wasnt so hell bent on enjoying the sport it may have dissuaded me. Luckily i was already hooked from my 8 or so days i mucked around in my first season, so i picked myself up after every edge catch and tried not to do it again. Face planting and pain is a pretty good teacher at the end of the day
I guess the point really is this though, (if youre wondering): you can learn on anything. And what you learn on will really only give you a fraction of the skills you really need to become good at this game, so dont think too hard on it. If you get a nice soft and forgiving ride, you might not trip up so much, but youll ride pretty loose because you dont need to ride tight. You may also find switch a doddle compared to someone on a directional. Finally, youll get to muck around a lot more practicing spins and stuff, while i would be flying down the mountain practicing my carving or popping into every massive flat powder dumps because my setback means im not getting stuck in it like you probably are
Well, i wouldnt be if you didnt have rocker and wasnt burning past me
But again, learn on a rocker and your rides way more playful, which brings us back to looser riding and not really dealing with aggressive nastier terrain as well as someone who has a more forgiving ride in THOSE conditions.
Pick your board and you pick where youre going to have the most forgiving and fun ride probably, but then you might just flip the script and decide you really like park, and are going to learn it on your freeride because you aint dropping another 300 notes on a deck just for park. Good on you!
I mean, you lose out on experiencing different types of ride, or different flexes and the like, but dang, youll be an all mountain demon on one deck. Choices choices. No matter what you do, you sacrifice something to gain something else. The only issue really is how much time you have at the end of the day.
And that kids, is a heideggerian inspired lecture on skilling up in snowboarding. You dont have infinite time, hence you always inadvertently give up something for something else, so in your first few years, my advice is do it all and then youll see what youre willing to sacrifice.
Of course, this means your first few years will be spent getting a generic skill set instead of being a champion in the park, or in natural terrain, or in the pipe, or charging trees, or burning the groms, or... or... or... and it might even mean you really just want to enjoy doing whatever you want each day anyway, which theres absolutely no law against.
TLDR: whatever you learn on will impact you in some way, but you wont be curtailed by it because you ride what you want. If you HAVE to choose one, just buy a nice medium flexxer and cover your bases until you realise where you want to ride. Then end up buying another medium flexxer with improved 2012 technology because snowboardings like that and youll probably want to ride what youre happiest riding anyway
Its not for nothing that as much as i loved my scope, im pinning for something a little more feisty under my feet