Indeed, it is about preference. For me, after many years of wingshooting, I'll always be faster on the target with a srtaight stock. I wouldn't look at a P/G. The exception would be a folding/collapsible stock where a P/G is pretty much standard. Beyond an old Browning Squareback, I have zero experience with semis. As a lefty though, I guarantee you I'll get a 590 going faster than an 870. In fact with my current Maverick, its just "cruiser ready", empty chamber, safety off. There is no safety on the gun as far as I'm concerned. An 870 would be the same way, but that's just me.
Meanwhile back on the thread, if anyone has anything to say about the 930 SPX vs the 590, I doubt I'd be alone in wanting to hear it.
FQ13