Benefits hmm probably not but if you appreciate things that fit together well you’ll like centrelocks

Have recently fitted some RT81s and they barely need the lockring to stay in place

Note that if you have a 15/20 mm axle you’ll need an external BB-style lockring

centrelock are less of a PITA for taking on and off than 6 bolts for me, that’s about it

C/L much less of a PITA to fit and remove.

Are the more fancy Shimano Freeza rotors only Centrelock? Thats about as much of an advantage I can think of…

On balance, if starting from scratch with a wheelset with an option of either I’d choose centrelock.

Pluses-it is very easy to fit rotors and can you use most standard 6 bolt rotors with an adaptor. I already have the tools as most are done with the cassette tool and those that are bigger use hollowtec BB tool. No more phaffing with bolts which I find very tedious after a while.

Minuses- more difficult to deal with or change on a trail (but when was the last time I had to do that?- oh yes, never) need one/ two extra tools if not already in your tool box. IIRC You can’t use Hope floating rotors with the adaptor, or 6 bolt XT rotors if you already have them

Centrelock hubs tend to be lighter too.

If your existing wheels are 6 bolt then I’d stick with 6 bolt, as you can swap parts between wheels