Has anyone tried to attend cles from 2 BJJ schools?

Yes, in fact i did some years back. The benefit is you get to compare techniques being taught in those 2 schools. The negative effect is you getting confused with different techniques that you need to remember day in and day out from 2 schools, PLUS the money that you spend. Imagine you're paying 2 schools in a month? Unless you have the money to spend, then go for it. I would certainly go for the one that teaches techniques first, because without knowing anything about techniques, how can you submit your opponent, or get into a dominant position? Attend the new school that you think is okay, then dig deep from within and ask yourself, which one do you think would benefit you most, sparring frequently without any techniques, or techniques first for muscle memory and less injury?