I have been to both (both being Adventure Parc at Mt. Tambourine and Green Challenge at Currumbin Wildlife Sanctuary, the newest of the two). Currumbin has 65 challenges over four separate courses (beginners’ course, two intermediate courses and the Extreme Green Challenge), whereas Tambourine has 83 challenges over five separate courses.
I prefer the one at currumbin because you get admission to the park with it (it may be $10 extra but that was a while ago), but my favourite challenge is the harness free challenge at Tambourine so it is a tough choice for me.
The flying foxes are great! There are multiple at both locations... Well worth the dollars.... I believe it took me 2 hours my last time but I was trying to beat my PB haha
They are heaps of fun and a great way to spend a day. Hope this helps