Dave. I have one of each in 9mm so I can't comment on the other calibers in either model. They are both sweet shooting pistols and in that regard are almost identical in my opinion. The 80 has the european style mag release on the butt of the weapon which is different from the 100 which is behind the trigger guard. All other controls are the same on both. After the A-80 was in production Astra built the A-90 which had the A-100's mag release but added a thumb safety on the slide, apparently at the request of law enforcement and military agencies.Hi fellas! What are the differences between the A-80 and A-100? They look identical to me. And, are they good in any caliber, or?