MX Clears> MX Browns 
from experience
i love the clear bump so much 

don't necessarily listen to what others have to say, some say ergo clears pronounce the bump, but you have to try both of them to decide
i dont think it does, it feels more defined on stock clears 
People say topre is tactile but from what i felt, it was just mushy...pretty boring..
have yet to try mx greys however 
