The volume pots are not the same as Core. I don't know what SE guitars are using these days, but the S2 volume pots are different from the older SE guitars.
The S2 push/pull pots seem to be of fine quality to me. Not sure if they're the same as Core, but most push/pull pots are very similar anyway. Don't think I've experienced any SE push/pulls.
The tone caps appear to be the same as Core. The white tube-shaped ones. You don't get the 180pf treble bleed cap on the S2, though.
I put Core volume pots (with the treble bleeds) in my S2 and it was a great performance upgrade for me.