Junction valve or dual caliper?

Im getting ready to buy a Grom to get back into stunt riding and want some input as to whether or not a dual caliper setup is worth the extra investment. The difference between dual caliper and junction valve was night and day on my F4i, but then again there is a huge weight difference in the bike and much higher demands on a big bike. If anyone has any input I would greatly appreciate it. Magura 13mm right side master used in both scenario.