BNB is no more ERC-20 token like Huobi Token, so you can use BNB in more diffrent ways.
HT is hyped now due to IEOs on Huobi platform, but as soon the hype around IEOs ends, price will back to normal.
Both are hype actually, but BNB gets more hype as they have more investors compared to Houbi AFAIK.
It's normal to see this hype since IEO is not yet spread in big number of exchanges, only few exchanges including the 2 are gaining the trust of the people, if we compare this with ICO, this is the early stage of ICO and IEO is expected to rise as more exchanges will gain the trust of the investors.