I cannot give you any comparison. I love my parks for waves. I have been riding the 12, 10, 9 and 8 in waves (the 8 only barely) and they did change the park up quite a bit this year IMO. The kite will go drift down the line better, turning feel similar in speed, but the kite feel a little tighter. Like it is a more even pull through the loop. It feels more powerful, but looks a little smaller.
I think most people will recommend the kite they are on (which is a good sign for either of the kites), so you'd probably do well on either one, but the park for waves is absolutely super fun.
The wind range and stability also feel improved. Me and my buddies are waiting for a good day to test the new ones side by side with the old one... right now it is "only" surfing here...
Skater is a killer series. Are you getting the 2012 or 2013? If you have cash floating around also get the 2012 4'8''..or maybe you can negotiate price if you're getting kites also...it is such a fun little skateboard. but the bigger ones should definitely be the main one.