Carmen avocados are basically the same as Hass; the Carmen tree just has a slightly different growing and flowering habit compared to Hass. Carmen originated as a natural mutation found on a Hass tree in Mexico.
Sir-Prize avocados average a little bigger than Hass, and they usually have a distinctive ridge near the stem. Their skin is thin, and the seed inside is small. One of the surprises about Sir-Prize is that the cut flesh does not brown as quickly as most other avocado varieties.
Both Carmen and Sir-Prize avocados reach the apex of their eating quality around April in Southern California.