Upvote:11
According to this site, the Bataan 2 is the plane pictured in the foreground, distinguishable by more (windows?) on the nose cone area.
More info can be found at the Aviation History website.
Upvote:15
The G6M1 were simply G4Ms reconfigured for transport, so the two are practically identical. Nonetheless, the component circled below indicates that the first aircraft is the G4M1.
That loop is featured on drawings of the G4M1:
But not on the G6M1-L2 series.
Click to enlarge the above thumbnails.