I'd like to hear
@ShakeResounding's response before voting
Wait no longer, friend.
I'm gonna play Devil's Advocate for Paramount here juuust a bit, but overall I agree X Sonic wins. I'll discuss Paramount's advantages:
+ Paramount's Chaos Energy is definitely gonna be a hurdle for X to clamber, and that's mainly if used by Paramount defensively. Nabbing X Sonic with one good jolt should allow him to have the potential for a follow-up counter-offensive.
+ Paramount can null X Sonic's Lifting Strength advantage in a round-a-bout way due to his zappy zap, though I doubt X Sonic will try to outmuscle him through this approach anyways.
+ Paramount's BFR has the potential to cause some serious trouble for X, as I don't think X has a way of getting back.
+ Because of both his Chaos Energy and Rings, Paramount has much more reliable control over the battlefield.
+ Paramount's diversity in his arsenal and moveset provides a bit for X to be worried about.
But despite all this going for him, yeah, I believe X wins for a several reasons. Here are a few of 'em:
+ X (despite his lack of a fleshed Intelligence section lol) has much more skill, being much more exposed and privy to combating more than just Knuckles and Robotnik.
+ X likely has better stamina, and is definitely the bigger glutton for punishment. He's no stranger to getting his shit kicked in and still evening out the odds.
+ What I believe gives X the win despite Paramount's Chaos Energy; Rings. If X is getting his back put to the wall, just ONE of these things will amp him to a level where he one-shots Paramount (and that isn't even mentioning that he can use the Chaos Emeralds to achieve a similar effect).
TL;DR- Paramount Sonic doesn't go down like a chump, but in the end there are nuances and things in his Standard Equipment that gives X Sonic the win.