I have played WOZ and ST - and it is a toss up as to which I like better. WOZ is very interesting to play, and feels really different than anything else I have played - it is odd, beautiful, fun, and interesting all rolled into one. Keith's talents shine!
ST feels like a solid flow Stern game - which is good. Another Ritchie hit. What helps ST is that I am a Star Trek fan - and if you are one too you will love the pin.
Both are well made, thought out, modern pins
Though on location I think WOZ would get the most plays due to its modern look and universal appeal - don't have numbers to back that up - just a feeling.
Other fruit for thought: My wife and daughter - who don't much care for pins - will play WOZ. My son doesn't care that much for it preferring TRON to any thing else - with Iron Man being a distant second. He feels like Iron Man 'kicks me off the table too fast'. Don't I know it
EDIT: By the way, daughter is 14, son is 11 (for context) - wife is 29 (that is what she tells me anyway .... every year)