I have a 2001 eton txl90 for my son.

how much extra power do you get from the "performance" ignition coils?

and what is the closest atv resembling the e-ton? it looks like Polaris parts cross match.

 

Aftermarket coils can be a good thing. A night and day difference, prolly not.
Most of the scooter based motors have interchanging parts, depending on the part. As you noticed, the polaris and eton parts can have a few different parts than the others.