Got over a thousand hours in Rollers, and about a hundred in Pratts.
The Roller is a hugely better engine, especially on approach, as the spool-up time is much shorter. The Pratts need a much bigger handful of throttle, too, to get the same responce.
(This is comparing the RB-211-535-D4X to a JT9D-7A, FWIW. Perhaps not a totally fair comparison, but it's all I can offer)
Haven't flown a GE yet, but by all reports they're better than the other two. Unanymous agreement on that.