difference HARDWARE heatsink red/black?

what is the difference of the ESC Tekin RX8 heatsink black/red?

[Semi Pro]

the color

[DwightSchrute]

this is just what i've read, so i'm not sure how true it is but supposedly the black heatsink rx8's might have had some board soldering issues. it happend to me.
i had also read that the red heatsink rx8's were supposed to have had the issue fixed with better soldering, however, i've also read of some of those having the same issues.
Also, the new red heatsink rx8's have a new case bottom than the old rx8 because they were flexing intothe boards and causing damage on some of the bigger jumps. here again, Tekin is supposed to have fixed all the issues now with the updated escs.

[TekinTeamMgr]

There is NO difference other than the color of the heatsink, period.

The only change has been to the case.