Here are the results of testing each pellet in pretty good conditions through my Cricket .25. Top row are JSBs and bottom row are AAs. Six-shot groups at 53 yards. Both shoot very similarly, but the AAs just did not group quite as consistently for me - at least with these particular tins. The AAs definitely feel a bit more snug than the JSBs when loading them into the clip.
(915 fps / 47 fpe).
(915 fps / 47 fpe).