Hi Freddie, as luck would have it, I’ve still got your old Elite and I picked up an as new condition American Professional 2 in a trade over the last few days.
In short, they’re very similar thickness from fingers to thumb, and maybe the Pro II feels marginally wider, but it’s mainly down to the Elite’s compound radius that makes it feel a fraction more rounded and that little touch sleeker. The Pro II neck is very nice to play on, and doesn’t slow me down at all compared to the Elite.