If trail centres are your thing, then Gisburn is worth a visit, it’s a reasonable xc ride with some bits to stop and play on, you could go round twice prehaps, it’s all marked. There’s also a small downhill area and skills area.
Stainburn is completely different to most trail centres and you’ll either love it or hate it. It’s very small and consequently has been built very XC technical, with stuff to session. once you’ve done the black, red, log rides and descent line a few times, across the main road is Norwood, recently felled, there’s nothing marked, but a bit of searching around you’ll find some stuff (up around the trig point). If you’re looking for a long xc ride and you don’t like play biking, then don’t bother with Stainburn.