Here's my summary:
The Bullets (which we have by the way, not just at ToyEast

) are a great way to get into BC-Gs. They use the exact same technology as other BC-Gs, but the bodies are less detailed, and they are not as high quality as the original TOMY. However, 90% of the time, if they appear to have a problem, it's something simple, like the back axle not being popped in properly etc., and can be fixed very easily. We're actually working with a factory in China to get these direct so that we can offer them very inexpensively.
The Huale/TT Trees are pretty much identical to the original TOMYs in every way, even down to the packaging. They are pretty much just discount BC-Gs, cheaper because they don't have the TOMY brand on them. Some of the bodies are less detailed, but many are exactly identical to the TOMYs. Some of them even come with 2.2 or 2.6 motors for the same price!
The original is the golden standard by which all others are measured. You won't be disappointed with a TOMY, but, you pay quite a premium for the name compared to the Haule/TT Trees etc.