Yeah after some searching I found Pete's thread (rv7driver) about his Cosmos 45. He lists the wingspan as 57.5" in that thread and it's designed for a side exhaust engine. The .60 size has a glass bellypan which runs from the nose to just behind the wing. The 45 has a wood block at the nose and the bellypan starts aft of the wood block. (which is what I think I see in the photo above...wood block nose thingy painted red - bellypan missing).

Pete's thread:
http://www.rcuniverse.com/forum/m_9563276/tm.htm


The nose area just in front of the canopy looks a little different on the .60 from the print/box photo. It seems a little longer and doesn't quite blend into the canopy as much as the .45 appears to. The turtle deck on the 60 seems longer and slimmer as well. (may just be my perception)

Just my .02...

Chuck

Photo: a shot of Pete's (rv7drivers) Cosmos 45