PP was just basically really smooth, clean, moderate gains that came at a constant rate. With SD, I just started going nuts on about day 3, and kept making progress for 3 weeks. I blew up, lost weight, and workouts were insane. But I could not run, even w/ supplementing w/ taurine / K - and I was lethargic - and after 3 weeks on my joints were aching so bad I had to stop.
SD is just a beast, and I love it, and I'm going to run 1 more cycle w/ what I have left. But if sides really get to you, stick w/ PP. For me, the gains SD gives you, it's worth the sides. Just my .02.