Combination is a catch-all term involving multibarrel guns utilizing different calibers/bores.

I believe Cape Gun can be used to describe both the guns you identify.

Other names:

1} Büchsflinte; sxs or o/u, rifle/shotgun, AKA "Cape Gun"
2} Drilling; 3 barrels, two shotgun, one rifle
3} Bockdrilling; o/u 3 barrels, 2 rifle {sometimes different calibers, e.g. 8x57J/.22 LR or .22 Hornet}, one shotgun
4} Vierling; 4 barrels, 2 shotgun, 2 rifle, rifle barrels different calibers {as in an 8x57J and a .22}