This was my dove, Sparky.
I didn't have him and Olive at the same time, but they are about the same size. Olive is a very small dainty pigeon, and Sparky was a very large dove. They were about as messy as each other, but some pigeons are much bigger and some doves are a lot smaller - it was really surprising to see small ringneck doves half his size in a shop, as I had only him as a reference. Maybe this is the difference in Jak and I'd perspective. Olive may be a couple ounces more, but Sparky was as long and had as wide of wings. Sparky had larger, wetter droppings that were a bit worse to clean. Olive has small solid drops.
Both birds were handleable. Olive is much more devoted. Sparky was more independent and more interested in birds, any kind, than people. Olive is indifferent to all other birds, but she loves all people. Sparky stepped up if you picked him up on your hand. Olive jumps up on request and flies to you.