All the eggplant are delicious, in my humble opinion! You will find that mini eggplant, like this baby eggplant and other smaller varieties, are sweeter/less bitter, have less seeds, thinner skins and may be more tender as well. Sometimes, they have a more intense eggplant flavor as well.   Larger eggplant are older and tend to have a bit more bitterness and more seeds. Overall, I find the flavor to be somewhat similar across the different varieties.