At the moment there are those three options:
- MaxxECU (Control via CAN just like OEM, no physical modification needed to gearbox)
- HTG GCU (Control via own system, modification of gearbox needed, original hardware removed)
- DKGECU (same type as HTG)
So, with all those three alternatives being about the same price, it really depends on what you are going for and what you already have. With MaxxECU you get engine control and TCU in one box, and retain the original functions/electronics of the DCT, meaning it is still fully functional to revert or install to any stock car if needed. Downside at least at the moment is only E-series is going to be supported.
DKGECU and HTG can do all boxes as they just replace the control electronics with their own.
In means of which controls the gearbox the ”best way” is surely debatable, and i dont think there are many people who have tested all three, so i’m not going into that.
I’ve tested the MaxxECU on my M50 turbo and it works great, handles likes stock and holds the little amount of power the car makes (800hp/840nm). I’m building another DCT at the moment and it’s from an M4, so i will maybe test HTG or DKGECU for that one.