I've ridden both within the last week, and not trying to disagree with the posters above, but I had a better experience at Killington. Stowe was incredibly crowded when I went, resulting in decent lift lines. The runs were amazing, the conditions were awesome (granted this was right after they got 20 inches or something), etc etc etc.
At Killington the next day, I had just as much fun but also got SOOO much more riding in. The number of lifts at Killington just blew my mind, and damn nearly EVERY single one is incredibly fast. Despite how many people were there, I waited no longer than five minutes all day to get on the lift, and the runs were equal, if not more fun than those at Stowe.
On a side note, Stowe DEFINITELY had better parks.
Hope I helped.
**** killington lift tickets work at PICO too, down the road.
Killington was a lot cheaper, I bought a junior ticket (up to 18) even though I'm nearing 20, and wasn't confronted once on every lift.
Mixed on your reply; Yes, Stowe's lift tix are as steep as the diamonds on the Front Four -- I believe it was about $84 last I checked. But I have never paid that. We're going in a couple of weeks for $90 for a three-day pass. Gotta know where to look!
As for the number of lifts and runs you got in...well, there is a reason for that: the runs at Killington are mostly very short, spread out over a huge area. They boast massive amounts of terrain, but I'd rather ride LONG runs, like at Stowe, than just do short runs over and over, then having to transfer to one of those many lift Killington has. They have so many lifts because of the terrible, spread-out layout of the mountain. You can't ride from one part to the next in most case, you have to get to the bottom, travers (read: WALK) to the next section, then ride up for more short runs. If you know Stowe, you can get from the main face area to the Gondolier/Perry Merrill trails, and have fun doing it. There is a gondola right at the base for the transfer over to Spruce Peak, if you want a change of pace. The so-called steeps at Killington just don't compare to what Stowe has to offer. Also, you have to work Stowe's lift-line openings; they stagger the four main lift times to help spread the crowds around the mountain. Besides all that, Stowe just has a much nicer vibe. It's pricey, probably more snobby, but again there aren't the assholes to deal with.
Oh, and I just got back from two weeks in Tahoe. I agree that if you have the choice, skip Vermont and go straight to Tahoe! No question!
My usual disclaimer - I don't like Killington (though I'd probably ride there with a FREE ticket), so I'm admittedly biased. But I don't Killington for good reason -- after many trips, I've never had a good experience there, whereas Stowe has never let me down.