Despite the nerf, the BAR still remains the stronger out of the two if you were to put them against each other. BAR is better than minigun in sparring situations and for attacking bases. Minigun is better at overworld pking and is one of the best guns for defending bases.

Also on the topic of the minigun i've seen some people say it's the same as the flamethrower and i'd just like to clarify that it isn't really. Flame is still the stronger of the two as it does the same damage as minigun aswell as burn and flame damage, burn is 1 damage a secound for a small period and flame is an extra 3-4 damage, I can't remember. Also flame doesn't have recoil which can be a disadvantage to the mini if trying to defend a hallway, and no spread which again helps with accurately killing people through doorways in bases or any small gaps.