Some advice needed if anyone can help

My ageing 535 gs is on its last legs now

battered, corroded and slack !! and I was intending to replace it with another one as my reel for the tops.
My question is wether the mag version is better ?? I know the 525 mag is vastly superior to the 525 gs as it has the ultracast style floating spool, however I believe the both of the 535s have the same internals ? Is the mag on the 535 powerful enough to brake a spool ful of 35lb mono too ?
I am completely happy with the GS but was wondering if the the mag version is just a touch faster ?
Cheers in advance