I mean I'm betting Gojo and I'm not 100% sure he wins.
Both have IMO strong arguments for victory. Even disregarding whichever stats you believe/agree with, as Both have various interpretations that can land them usually in similar ball parks. As G1 blog showed IMO. So it's truely down to abilities and which win con Death battle believes is more likely to go off first.
I am predicting Gojo high diff
Verdict wise:
Seems like once FTL/rel+ JJK is established it is makimover with IV + purple GG more than gojover with control or death ritual.
Also past Death Battle episodes seem to buy "atomic level destruction more than enough to overtax cellular regeneration", "attack speed > regenerating speed enough to work through damage transfer or regeneration".
Animation wise:
(0:00 - 0:40) the sneak peek
(0:40 - 1:00) Standard fighting where Gojo blocks all attacks with No Lower Limit and Makima keeps regenerating from severe wounds.
(1:00 - 1:36) Some more standard cool fight choreography. May insert a moment where Makima Bangs Gojo to interspace just for him to teleport back.
(1:36 - 2:20) Then Makima summons her armies and Gojo took some time but used blue ball to clean up the crowd.
(2:20 - 2:25) Makima got some time and is midway of completing the ritual, but is interrupted by Gojo.
(2:25 - 2:46) Makima briefly fights Gojo, then tries to mind control Gojo with Control and she will drop the line like "die for me or bark for me" - just for Gojo to "meow" or even "roar" back (may involve RCT)
(2:46 - 3:04) - Gojo then finishes her off with IV + purple. May have some speed competition on how fast Makima tries to transfer damage versus how fast Gojo fires Makima into char dust.
(Extra time) Gojo trash talking time.