Versicolors are very nice!! They build beautiful webs and are just gorgeous!! They don't flick hairs but will shoot poop and rub their butts against you to get you with their hairs. They are not very hardy though (I have never had a problem with them personally) and I've heard from quite a few people that theirs are a bit defensive. They also require more height then floor space, good ventilation and good humidity.
I have never had a grand canyon black so I can't comment much on them. They can flick hairs as I am guessing they are a Aphonopelma but how often or readily I don't really know. I doubt they build nice webs either but I don't really know that for a fact. I had a Aphonopelma sp. New River female and she was a sweet heart. Never flicked and was as calm as can be. Not the same T but just saying...