Having carried both quite a bit over the past 10+ years, most of the time and for most purposes I prefer the P2000. But there isn't all that much difference. The sk is very slightly easier to conceal and is fine for in town use. Where distances might be longer I like the P2000.
The past few years I've been moving away from P-series and toward USP series, but that's a personal thing that I'll explain when there's a bit more time and I'm caught up from todays end of fiscal year crunch.