I don't have any pictures offhand, but the gar forum stickies lead to several websites with juvenile shots of both species.
The gator gar is easily recognizable as a juvenile. Just look at the snout and the big eye. Once you see a picture you won't ever mistake one for a florida.
even so, it wont reach 14' or even 8' building a bigger housing pushes it aleast to grow longer not fatter. i dont want my gar to get stunted since im really excited about it. it rally grows damn fast. mine jumped for 6" to 8" in ten days.