Skill Level of Players above NL10

[stephx]

Hey guys, been lurking for a little while and decided to start playing cash games now instead of SNGs. I started playing NL10 6 max and am so far feeling very comfortable playing at this level. I wanted to get some feedback from all of you regarding the skill level of players on average at higher levels (NL 25, NL50) compared to NL10. Are the players at these higher levels much much stronger ? What normally differentiates players at these higher levels if so ?

Thanks,

Stephx