Here's the Midway ballistics Information for the Cor-Bon .380:
•Muzzle Velocity: 1050 fps
•Muzzle Energy: 220 ft. lbs.
EDITED:
While I would still rather have the .380 it appears from these stats that there's little difference. The Walther I have appears to have little over the mousegun NAA has than maybe better accuracy but at 5 yrds- just maybe the weight isn't worth it?