Huobi and BNB are very good coins at the moment, but in my opinion BNB is still slightly superior to Huobi because currently there are many platforms that are collaborating with BNB, but it all depends on the demand for the cryptocurrency market going forward, if the market demand is more Huoby it is not impossible can overtake BNB
I think if I compare the two, I would choose BNB more because this coin has been with me for a very long time and more benefits when holding this coin. I also hold HT but mostly in terms of profits since Huobi is not my favorite exchange to enter this market. Anyway, both of these coins usually rise in price together when the market starts to rise so the decision will be up to you.
Binance is more popular as compare with Huobi so that I also would like to do agree with both of you. It is wise decision to keep holding BNB to take some benefits from the exchange as like they offer some kind of airdrops and lottery tickets after the successful launch of IEO. I also would like to prefer BNB.