My only experience of Tonerider AC4s was when fettling an ES-1 kit for a UK builder that needed fret levelling.

I thought them very powerful and it was very easy to overdrive my normal clean setting on my Two Rock amp.

I fitted a Rocksong in the bridge of my Hexacaster build. And although it was more powerful than I normally like, it has a nice bright edge to the sound, not too much bass, that fitted in nicely with the single coils.

I haven't tried the AC2s, but they should have a bit less output than the AC4s, mainly because the magnets are a bit less powerful. But I wasn't that keen on the Iron Gear Alnico 2 Tesla Sharks I originally had in the SG build. But then again, I love the alnico 2 P90s I have on my 330 style ES-1, so it's more than just the magnet that drives the sound.