Well, I may be a little biased;), but it depends on what you like. PKD and SFA are similar parks in many ways.
They both have waterparks included in admission, though SFA's is better IMHO.
They both have Premier-LIM coasters with practically identical layouts, except SFA's doesn't practically stop due to a mid-course, like PKD's, though PKD's is enclosed and has better theming, though its also rougher.
With wood coasters, its almost a no-contest win to SFA. PKD's Grizzly is overbraked and uninteresting, though Rebel Yell is pretty good, but their tracks almost never race, and The Hurler has a nice drop, but esentially nothing after that. The Wild One at SFA is a moved 1917 Classic Woodie, with airtime and lateral Gs galore. ROAR! is yet another example of GCI greatness, and puts SFA over the top with its 1-2 woodie punch.
After that, its close. Volcano at PKD is better than the Mind Eraser at SFA, an SLC. And I'll just put H:XLC and S:ROS at the same level, because I'm sure H:XLC will be awesome as well. Don't forget that SFA will now have a Vekoma Flying Dutchman as well, which I think puts the final nail in the coffin for SFA.