If you have the space under the bigger wheels the. Go with bigger, you can easily add a bias valve (not bias pedal box) and adjust it to suit the perfect split. A good mot station can help set the basic on their brake tester.

One other thing to mention, you would probably find that an AP disc at 300 is probably better than 330mm lower quality disc so the quality of disc is important but I think reyland is good and the quality will be the same no matter what size with both kits from the same supplier.

MT does nice kits and communicates much more effectively then reyland

I was always taught by instructors to load up the front by braking firmly and then progressively so the technique could never over work the rears as the front was always weighted up. I.e, a firm but gentle brake to push all the weight forward and then you can really stand on the pedal. Works well trail braking too.

I had an awesome brake set up on my 911 but was always amazed when Dan Cooke or Trevor Reeves drove it how much better the braking distances and power of the brakes was...the reason 10,000 hours of track technique.