For counterspell at higher levels, the PHB says:
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the interrupted spell has no effect if its level is less than or equal to the level of the spell slot you used.
If you cast counterspell as a 4th-level spell or higher, do you still get to make the ability check if the spell you are trying to counter is higher than the spell level you cast? Or does just nothing happen on a successful save when you cast counterspell as 4th level or higher?