Internal..external..magnetic..etc I find they all end up set to one spot and then left there, with the only adjustment being the spool clearance/brake being adjusted for lure weight, so I wouldn't limit my reel choices based on the backlash brake system. Terry's niffty electronic wiz bang baitcaster don't cast any further than the others....except when he's talking with his wife about the superb action to justify the $$$'s!
My ABU MagII brake has been set to the same spot for 24 years. I tried going one setting lighter this year, thinking I had 23 years of casting experience with it.... and it wasn't pretty!