Are beetle type 1 and type 2 engines the same?

Some of the very early Type I and Type II engines were pretty much the same, that similarity ended in the 1960's. Most type II engines have a fan setup quite different from the Type I vertical fan housing. This means that stripped down, the blocks looked the same, but all of the cooling metal carburators, manifolds etc., were different. Most of the later type II engines were also bigger than the Type I engines, as they were in bigger heavier vehicles. Some parts will interchange, others can with modifications. Giving specific answers to a particular situation would require that I know what specific Type I and Type II year(s) you were interested in. For example the Type II got the 40 HP engine ~ 1958 or so, the Type I did not get that engine until 1961, then they were the same for another couple of years, then the Type II got a bigger engine.