850R 320mm V 336mm front discs/rotors

Hey gurus
Would there be a significant difference between 336mm to 320 mm discs on an 850 ?
I ask as at the time when I converted to Alfa brembos I couldn't find 336mm brackets only 320 .
Fast forward to now , I've found 336 brackets and arrived today . So just new discs required , what's your thoughts ?
With 320mm discs
Comments
Sure when the 320 discs wear out grab the 336
Otherwise it's a bit of a waste of money right
Get a pair of Ceika 6/8 spot calipers to go with the big disc, put Brembo on back.........
Boss swapped Ceika in on his XR6 Turbo tray back ute when they told him what new Brembo discs and pads cost for the standard fitment brakes, loves em.