Phil,

The wings are not the same. The UFO wing spans 65 1/4" with an average chord of 10 3/4" and is swept back. The Dirty Birdy wing has slightly less span at 64 1/4" with an average chord of 11" and no sweep. UFO wing area is 692 sq. in. and the Dirty Birdy has 688 sq. in.

These figures are from the RCM construction articles.

RG