I know, right? Personally, I feel like they'd be a great reversible couple, but that's the only way I'd really be able to see Victor on the bottom.
Character-wise, he has more experience and confidence and is usually the instigator so while he has had some uke-ish moments... I just can't see him stuck there.
Plus, Yuri is the one who explores a bit more of a feminine-ish side in the show (with his movements), plus, he has no experience and not much confidence until the end. I could see him on top occasionally, but not every time.
I see Victor more as a seme is it just me? I just like the cute regular Victor then in sex more serious and manly. Yuri is more of a klutz which usually equals uke is it just me?