Mamba Micro Pro vs Micro Sidewinder

If someone could help clarify a few points for me that would be great

First up either ESC will be be going in a twin ESC berg in the 4 to mid 4pound range running 16t 454 puller's, on 3s. I believe the motors would be roughly around the 25-30amp mark. Oh and they are brushed motors.

Now from what I can tell the micro sidewinder is a decased mamba micro with no heatsink. If I were to add a heatsink to a micro sidewinder would this be roughly equivelent to a mamba micro amp rating wise? If so this is very appealing as I would remove the case from the mamba micro anyway for size. However if there is another major difference that reduces amp capacity please let me know, I like to keep my magic smoke inside my ESCs Or plain and simple am I just better off spending the extra $30 over the sidewinder micros and getting the mamba micros?

Also if the heatsink option is worthwhile, is there really any special shape of heatsink I should be looking at. I understand the pin sort would have more surface area and should technically cool better, or on such a small size does it not really matter?

Thanks in advance!
Kieren