Hi there
Not the biggest expert on here, but essentially brushed motors will need maintenance and on the whole a smidge slower than brushless.
Are you planning on racing or bashing? if racing, worth having a look at your local track to check if they've any club rules around motor type - if just bashing, I'd have to say go brushless.
I bashed when I started out and my car had a brushed set up - which often got jammed with dirt and debris - moved to brushless and that problem soon disappeared
