I haven't had experience of either of those brands but I've heard good things about them.
I tend to stick to vale tudo style shorts (not much to them, but I use the BTT ones and a set of Wand) and have a couple of pairs of the Koral VT Pro's which I would highly recommend; amazing rip-stop construction, extremely durable, Koral are an awesome brand.
I haven't had experience of either of those brands but I've heard good things about them.
I tend to stick to vale tudo style shorts (not much to them, but I use the BTT ones and a set of Wand) and have a couple of pairs of the Koral VT Pro's which I would highly recommend; amazing rip-stop construction, extremely durable, Koral are an awesome brand.