Wildhare:

Wing span 64"
70" rudder to spinner
Approx. 17 lbs.
1450 sq. in.
50cc-60cc gas

Aeroworks:

Wing Span 68 inches.
Wing Area 1666 sq. in.
Fuse Length (Rudder to Front of Spinner) 78.5"
Cowl Width 10"
Weight 17.5 to 18.5 lbs
Engine 50cc

The Aeroworks is slightly larger.
Also being a longer plane it flies IMAC very well. Tom's Wild Hare is an amesome plane, but as stated no longer available.
I have the Aeroworks and absolutely love it. It ended up being 18.5 lbs but does have 1666 sq" of wing area.
I will definately recommend a motor a bit bigger than 50cc. Especially if you are at any altitude. I am at about 960 ft and am using an MT57 with a Xoar 23x8. Works good.