It really depends on what you like and what is available near you. The individual rabbit does play a role as well.
Lionheads do require more grooming, so you do need to be prepared for that and that there can be more fur around. They don't really require a special diet, but you want to avoid using shavings or other loose litter (even some paper based litter) as it can get stuck in the fur.
Mini lops are a bit bigger, bring around 6 pounds full grown. Lop eared rabbits can be more prone to ear infections, so you do need to keep an eye on the inside of their ears.