How to tell good clone Xhorse mini VCI cable techstream from a bad clone, this is what I verified and think it may be helpful if I share here.
Good clone Xhorse Mini VCI cable firmware >2.0.1 support VPW protocol. I got from cardiagtool.co.uk, they always offer such clone and will not have problems.
Bad clone Mini VCI cable with FW 1.4.1 and lack VPW protocol.
If you would like to reset immo, or make customization to cars, you need at least 2.0.1 FW with 2.0.1 FW there is change in PCB, as it supports VPW, and has extra security chip. On the other hand, all these simple clones with 1.4.1 FW support only CAN and K line, VPW protocol is unsupported in 1.4.1 FW, and there is no parts for it on PCB.
As you can see, this is the PCB for the good clone Mini VCI cable with FW 2.0.1 and VPW:
And the outlook
Here the PCB for the bad clone Mini VCI cables with FW 1.4.1 and lack VPW: