It's mostly a mindset thing, European valorant players don't chase social media relevancy as hard as NA pros, they dont stream as much and focus mostly on scrimming and training, there's nothing wrong with wanting to build a personal brand, hell i'd even say that from a career point of view, NA players are smarter, cause they build audiences that stick with them and provide them with a consistent income, look at Shroud and how he turned his meh CS career into a streaming empire or on lower scale, look at BabyJ that despite being unsigned makes a living streaming valorant cvause he used his time as a pro to build a brand.
In EU, most players have a background in traditional team sports(look at how many pros used to play football or things like that) and having that team game mentality makes hella difference, it teaches you how to treat your teammates, act profesionally, suppress your ego and makes it clear to you that training is sacred and more important than anything else.
This kind of mentality definetely amkes for better teams and team players, but you arent building huge personal brands so maybe in the long run you might actually lose out, money-wise.
I also think a lot of NA pros aren't as passionate about the game, most of them are either failed CS prospects stuck in tier 2.-3 of NA Cs(dapr,tex,crashies, curry, penny, food), Players past their expriation date that couldnt find teams(Dephh, FNS, hazed) or players forced to swtich cause there wasn't enough money in the game anymore(Subroza, WARDELL, Ethan, Vanity, Xeppaa, Leaf), all these players I feel like aren't in Valorant cause they truly love the game, but because it's the only game in NA that pays as much as it does, not to say that we dont have those types of players in EMEA(ANGE1, ScreaM, CREA, HyP, Mixwell, Hoody, Nukkye etc.) we also have lots of ex-CS pros that couldnt land jobs and switched, but I feel like the main core of Valorant players in EMEA is young players that never really had a career in CS and are now realizing their dream in valorant(nAts, Shao, Cloud, cNed, twisten) which I think makes them way more passionate about the game, just my opinions tho.