I dont own any 550s, but they do kick much butt!
Back in '99, i had a choice of a 550, a 570, a 520, and the 520qs.
The internet told me that middle pickups were bad (lol) so i looked more at the HH 520 models. Out of those, i felt the mahogany ones were a bit different and special, so bought the 520qs.
It is still with me 22 years later and is now a main player. every pickup i tried sounds better in this guitar than any others. Its crazy.
I so own and rg3xxv (its a 25th anni reissue of the rg565), and an rg921 (hardtail)
I did get a chance to play a few of the genesis 550s. They feel like an rg should, and have the right bridge. Swap the pickups and never think about it again, they are that good.
i would choose the purple one over the others. So pretty.