The single advantage that Taigens V2/V3 boards have over Heng Longs Version 6.0/6.i is that the Taigen board can be used with an aftermarket transmitter BUT in my opinion the Heng Long Version 6 variants are in every other way far better and having Airsoft AND I/R in the same Tank makes it a no brainer when deciding which Tank to buy,
Taigen STILL mould tools and fixtures to the Tank whereas Heng Long for many years provides them separately which make painting the Tank much easier.
The one thing that Taigen have got right is the latest Panzer 4 Turret which (Whisper it quietly) is in my opinion better than Tamiya's.