Yeah, Pogba = Vieira is the first thing that comes to mind. Tall, French & highly technical black midfielders... so, basically indistinguishable.
Kanté = Makélélé is another one that annoyed me to no end. They couldn't be more different in the way that they've approached defending but because (I assume) both are black French midfielders of a similar stature that played for Chelsea, Kanté is suddenly the second coming of Makélélé.
But the most widely inaccurate is, probably, the Lukaku/Drogba one. Again, both black (I'm sensing a pattern), both are absolute units and both played for Chelsea... but Lukaku is pretty much the antithesis of Drogba... invisible in big games (but stat-padding against weaker sides — while Drogba was unplayable in finals but often didn't score enough goals throughout the entire campaign), surprisingly weak in any physical challenge (while you can argue that Drogba is the prototype of the modern target man) etc.
I'm sure that it happens a lot with non-black players too but there's certainly a trend of categorizing young up-and-coming black footballers inside familiar stereotypes.