I think 6-APB is far better than 5-APB in every way in terms of effects. 5-APB to me feels like boosted MDAI, i.e. sedating but more powerful and longer-lasting. This is my experience, and I have read that many find 5-APB quite stimulating. Maybe what I had wasn't in fact the real deal, or maybe it was them who had bunk product. Maybe it's all of us.
6-APB to me has just the right level of stimulation to be appropriate for any situation. I still haven't taken it in a club, but I've taken it in daytime, night-time, alone, with friends, at home, outside, and it's always been superb. I find overheating a consistent problem. I get this with most drugs, but this drug is the worst in this respect. Jaw trembling is treated with chewing gum, sweating is forgiven, cool down breaks are had, and a good time is a guarantee. No bad comedown but severe lethargy the next day.