Function wise – both can get the job done (i have BJ 85 and have played with the blacky hechi reel). The blacky reel is pretty smooth although the BJ85 is by far the reel that spins the fastest I have seen. Some people find the BJ 85 is way too smooth and the fishing line is very easy to get screwed up if you are not familiar with the operation of the reel.
One thing the BJ85 has an advantage is weight – it is lighter than the Blacky reel. But depending on which rod you use, having a slightly heavier reel on might give you better balance.
In conclusion: just go for the blacky reel if you like it!