Ive started MMA classes but I have another free class each week to learn another art. Which would you choose?

krav maga is one of the best on the planet right now and rare as hell to find a good teacher jump on it i have done martial arts for years and fought many of those styles listed in street fights and from that and what i have seen on videos i say krav maga but bjj is my secound choice buts give you an idea krav maga has 85%my vote and bjjhas 10% the rest got the remaining 5% split between them