Aside from being different size engines, they are totally different engines with no interchangeable parts.
I need more information than to assume an easier question here. 4.7-3.8 is 0.9 litres. however i doubt that was the question.
It is: 79-38 = 41
It is 52 - 38 = 14.
14.6341% difference.
20
57
Bullet diameter on a 38 is .357; on a 380 it is .355 Case is longer on a 38.
though they have one similarity both have the difference of 38
38
It depends on what you mean. A .38 revolver may be a .38 special, but there are other types of .38 besides just the special round.
5 degrees
32 caliber is a little smaller then the 38 caliber
38