It looks like the GP4 style caliper is the new reference standard for Brembo as used in the 2020 MotoGP and named the GP4
Link to the latest Brembo Press Releases Dated July 13'2020 (last week): https://www.brembo.com/en/Comunicat..._PR_Brembo_2020_MotoGP_World_Championship.pdf
Below is copy and paste of the paragraph discussing this latest GP4 MotoGP Caliper from this Press Release: The new GP4 caliper The 2020 MotoGP Championship will feature important innovations related to the braking system: after the Valencia test in 2019 and those in February in Sepang,
will be the official introduction of the GP4, the new monobloc aluminium caliper machined from a solid, with radial attachment to 4 pistons.
This caliper is distinguished from that used until last season thanks to an extreme design that incorporates some of the stylistic features recently used also on motorcycle calipers for road application
and that introduces an innovative technical solution: the new fins on the external body of the caliper.
A solution that ensures better and faster cooling of the caliper itself and, consequently, of the entire braking system.
At the same time, the amount of fluid inside the brake system has been reduced, this will allow greater constancy and a decrease in the sponginess of the lever.
I already had a forum member committed to purchase my stock Stylema calipers next month, and I was going to purchase the GP4-MS, but I decided to do some more readings and that is how I found out about this news.
Now, I believe sooner or later, Brembo will have a road going version of this calipers with cooling fins... maybe in the next few months or maybe in a year or so... (like GP4-MS but with cooling fins and maybe a bit higher pricing).
Well, since my bike will not be "traveling" anywhere anytime soon, I think I will postpone my purchase and wait until they have the road going version (with the seal for road use).