I don't know how many people are arguing but I cannot understand getting that angry about action figures.
These bootlegs have been out a very long time and they're widely regarded as some of the best bootlegs of a figure that have been made.
I have the bootlegs and I've had the official ones (sold those). The ones I have are very solid. They do have the same problem that NECA figures have where you often feel like you might break a joint when you try to bend it, but that's still a NECA problem anyway.
The only real differences are that some of the parts on the NECA figure that are in a softer plastic and done in a harder plastic on the bootleg. The peg holes are more messy, And the shiny paint -- in this pic you can tell the bootleg is on the left by it's shiny stomach.
This has a good rundown:
http://thefwoosh.com/2013/10/fraudulent-figure-feature-neca-teenage-mutant-ninja-turtles-bootlegs/ 