For outdoor use the PM2 is better, because the longer blade and bigger handle make hard cutting easier, for lighter duty, the Para 3 is superior, since it takes less pocket space and is still an incredibly smooth and sturdy knife. I thought the Para 3 looked ugly until I actually held one in my hand, product shots somehow don't convey the balance it has and make it look stubbier than it is in real life.
The only downside to the Para 3 in my book is that the stock clip forces the knife to ride a bit higher in the pocket than I'd prefer, so for tip-up carry an aftermarket deep carry clip is almost required.
I like S30V (S35VN better!) for all-around use and S110V for coarser, or more extended cutting tasks... both fine steels, but neither is my favorite ("blurple" however is the best stock G10 scale color IMO!). If I had to choose a currently available steel for either, the S35VN/Tan distributor exclusive would be it; takes a nicer polished edge than S110V, sharpens easier than S30V... of course YMMV