War Arc Gaara wins,
-Amaterasu is countered like in canon [
You must be registered for see links
] or an eggshell of sound protects him from Amaterasu on all sides while he uses Third Eye. Sand clones can also be used as feints for Amaterasu.
-Genjutsu is rendered useless as long as Gaara surrounds himself with sand and uses sensor sand to detect Sasuke instead. Gaara's Third Eye might counter genjutsu as well since it's not direct eye to eye contact.
-Sasuke's hawk won't be any faster than Deidara's bird, in which case Gaara's gourd sand
You must be registered for see links
and crushes a wing so it can't fly.
-If Sasuke hides in Susanoo, Gaara can turn the location into a desert [
You must be registered for see links
] then use the sand at Sasuke's feet in order to
You must be registered for see links
then catch him in a sand coffin, large enough to where Sasuke can't break out with Chidori Nagashi, and crush him.
-Sasuke can't spam fireballs into the air since Gaara can block the atmosphere [
You must be registered for see links
] and if he uses Amaterasu on the surrounding desert to release heat into the sky Gaara can bury the fire deep belowground. So he isn't getting a chance to set up Kirin.