There is no difference in that either can be used for the other job. Of course there are hundreds of types of guns around in the building industry.
Mainly in the stock
Stock dimensions and sights
One barrel
A sub-machine gun fires pistol cartridges. A machine gun fires rifle rounds.
Stock and sights.
2mm in case length.
none.
You have answered your own question.
Generally, hand gun includes revolvers and pistols. Pistols, refers to semi-automatics
Size.
wood, finish, stock dimensions
The 60 cal. has a bigger barrel.