Raw and Cooking: Some even suggest when choosing pepper for raw food like salad, you should go for the female ones. The reason being they are sweeter than the males. And if you want to cook you should go for the male pepper with the 3 bumps.
Gender: Just like the flowers on some other plants, the flowers are responsible for pollination. The flowers on pepper have both the male and female reproductive organs making them capable of self-pollination. So bell peppers fruit have no gender.
Lobes: These bumps are formed differently according to their growth rate and genetics. There are various peppers that range from 2 to 5 lobes, so if you come across 3 or 4 lobes it's because they are bigger.
Sweetness: Sweetness or flavor is not decided by the number of lobes or bumps. Sweetness can be determined by the degree of ripeness just like any other fruit. Conditions such as soil type, climate condition, time it was picked, etc. can determine the taste.
Seeds: If you are looking to get bell pepper with more seeds, you probably should go for the one with more lobes. The 4 lobes pepper may contain more seeds because there is more cavity space for seeds to grow. However, this may not be the case for all 4 Bell Peppers.