I like gear diffs, but then I have such limited experience with ball diffs, guys who have been tuning balls for years seem able to get 'that' much more from them, but I think for someone newer to electric maybe gears are a much friendly option.

Just based off some stuff I noticed, the gear diff seems to stay exactly the same during a heat, or even during a whole meet or more (without being touched), the last ball diff I built you could feel it change/alter throughout a heat.

Also I tried a front gear diff, and yeah you loose some drive out of the corners, but I was surprised how much easier it was to drive with, the spool seems to fight the turn in, diff just glides in, I can see spool cars pull out a bit harder than me, but then I'm able to come in a lot quicker.

It's all playing with oil weights as well, I had like 100k up front and it lost a lot of drive (compared to spool), but 200k and it's not bad now (300-500k and I recon it would be golden), as for the rear I just kind of love it so much I can't imagine putting the ball back in.