So, the depiction in Guardians was basically the more comic-accurate. Whereas the Kree we've seen in SHIELD have varied between being gigantic CG corpses to Bolians who are imposing hand to hand combatants that can survive a fall from space. Plus that one that just looked like a typical human last season.
The Kree are a warrior race that uses genetic manipulation as it suits them. There's going to be variation.