Team 1 obviously. At this range, Gaara may even be able to solo. Deidara whipes the floor with Darui while Gaara casually buries the Raikage. Remember the Raikage's most powerful attack was tanked by Gaara's sand. Both team 1 can fly which would make it hard for team 2 to get hits against anyone from team 1.
Raikage's team's best chance is to blitz Deidara and take him out but Gaara can protect Deidara just like he intervened in the Sasuke VS Raikage fight. Darui's lasers are pretty dangerous but an airborne Deidara can probably dodge and Gaara's sand may be able to tank the attack with some difficulty as Gaara's sand has been shown to be weak against lightning.
So team 1 wins with mid difficulty.