Well i have participated in multiple bounties launch by this two platforms and i have to say that Both are great. BountyHive i think is old and those days when the market was still good, they had good bounties there but now i can say BountyHive end up promoting so many projects that later turn out to be scam. A good example is Shopping and many others that could raise up to $100 from ICO. As for Bountyplatform, they ain't left out too but if i am to chose between both platforms i will definitely go with Bountyplatform as first choice. There is another called Bounty0X, this platform look more organize than both. Maybe you should visit Bounty0X too.