Just for fun I made a slide of a hot dog. I got the idea from one of the senior pathologists here- he fooled us by slipping it into a set of unknowns from a weekly slide conference.
Then later I found a piece of pepperoni in the stomach of a dog and I wondered how it differed from the hot dog.
Similarities: Both are composed mostly of necrotic protein and some recognizable striated muscle tissue. They both have pieces of cartilage and bone and a lot of fat.
Differences: The pepperoni has larger and more abundant fat particles. The hot dog appears more solid and has more larger chunks of muscle. The pepperoni is more stringy.