Replying to SPK or STL - please help!!

So, I can get the SPK skis for a reasonable price, but I've heard that they're not great when you get a lot of speed and some other things as well. but I like that they're light. I'm only gonna ski it in the park because I have other skis for other stuff. also I've been looking at STL, I really like them and I've heard only positive things about them from people who've tried them, but they're a lot more expensive.

my question is, since I can get the SPK a lot cheaper than the STL, is it a good ski? does anyone know/have skied it? is it worth saving some bucks for?