The footprint shrink tech is a big winner for me on these boots. I'll be running size 13 boots and anything that helps cut down toe drag is helpful
Pretty much all the Burton's have the shrinkage tech. And I know that you have had issues with boots being too tight before, but you are still pretty new to this and you will be surprised how tight boots should fit and how much they pack out - so there is a good chance that you do not need a size 13 at all based on your other posts.
I see that you have bought a lot of high-end gear (T. Rice/Factory, Proto/Contact Pro) and want to get quality stuff, but it cannot be emphasized enough that proper fit is so much more important than brand, tech, price point, stiffness, etc.
Plus, early on in your riding career a stiffer boot can be really detrimental to progressing - it gets in the way of learning proper ankle flexion to tilt the board.
I say find a shop, any decent shop (and there are lots in Germany) and try boots on in person. If it is a good shop with somebody who knows their shit, buy whatever they tell you, regardless of brand, tech, price point, stiffness, etc.
If they do not have clued in people in the shop, buy what fits best regardless of brand, tech, price point, etc.
(see the pattern here?).
If necessary, try the boots blindfolded so not to be distracted by the all the fancy tech.
Trust me, it is the smart thing to do.