The ESC has 2 color options. They have the same performance.
XERUN-150A-SD (Blue), PN = 81020190
XERUN-150A-SD (Black), PN = 81020196

1 Specification

1.1 Output: Continuous 150A, burst 950A.
1.2 Input: 6-18 cells NiMH/NiCd or 2-6S LiPo. (But 2S lipo or 6 cells NiMH is not recommended)
1.3 BEC: 5.75V/3A (Switch mode built-in BEC).
1.4 Resistance: 0.0002 Ohm.
1.5 Motor Supported: Sensorless and sensored brushless motors.
1.6 Suitable Motor: * Note #1
When working with 4 cells Lipo: KV<=3000
When working with 6 cells Lipo: KV<=2400
1.7 Suitable Car: 1/8 On-road/Buggy/Truggy/Monster competition.
1.8 Size: 58mm(L) * 46.5mm(W) * 35mm(H).
1.9 Weight: 105g (Without wires).
*Note #1: The above KV number is the value of a 4274 sized motor (Diameter=42mm, Length=74mm)

Man..all this time wasting over a speed controller
it does say on the Hobbywing site it is not really recomended for 2xcell and tells you what motor to run...
If you have been in the Hobby for as long as you say you would know that it was really designed for 8th scale and 4 cell plus...or you should have done youre research before buying it and why didnt you buy the sct version if thats what you were running it in?
Why dont you just sell it to an 8th scaler and move on.