Two awsome games. I have TZ more highly rated and think it's probably the best pin of all time, but if I'm really into bright lights, STLE is my preference for the best light show in pinball, and it helps that the game shoots great too.
I had TZ and have STLE, don't plan no selling my STLE for a super long time, to me TZ was a maintenance problem and I don't fix my own games so I prefer the newer titles as you could guess from my all Stern lineup. Color changing insert lights for the win.
TZ better game, but STLE also very good, but my preferrence to the color changing inserts and side cabinet lightshow.