Its a difference on each level if you ask me
In my opinion you find better players even on the next level, but skill is different than actually winning. The lower limit a table has means more crazy callers you get, so when you are playing low stakes you have to be prepared to lose against even the craziest card, and you can even bid a lot higher than on mid and high stakes. Let say you push all in on a microlimit with AA, its not unusual that a A10 makes a call. But if you do the same on a 1 dollar table the chances are less than 1 percent.
In percent there are also a lot fewer callers on the mid and high tables, they play tighter, that means easier to steal money, but if you got the AA and someone hits a two pair by luck the chances are that he will steal more from you because he reads you right, and suddenly you are down by a buyin.