Hi
i have a couple of galaps and I am working on getting more. Several of my friends have Galaps and aldabras. I agree with ED except I would say Galaps are more like golden retrievers with shells (maybe more intelligent than a golden). R.C paul wrote a book on Galaps and he has had alot of experience with both. He seems to prefer Galops as far as personality also. Galaps evolved with finches that eat paracites and dead skin off of their neck, heads, and legs, so they enjoy being scratched and petted. Mine will amble up to anyone they can corner and stand up hi on their legs and extend their necks for you to scratch them (I call this the boner when they do this). I have an 11 year old female that is going about 250 to 275 pounds. Not all Galaps get this large at this age.
galaps are also more expensive and a lot harder to come by. You also need the permits to get one outside your state. Most Galaps in the private sector are in florida, although, my partners and i will probably have the scales even in a few years.( we are in California).
If you live in an area that gets cool in then winter, it can be a hassel to keep them warm. It's not like you can pick up a two hundred pound tort and put him in the den overnight. I have had my fingers crushed pretty good when trying to lift one and the animal retracted it's leg. I also prefer galaps because they are one of the animals Darwin based his theory of evolution on and ofcource the Galapagos Islands were named after the tortoises (Galapagos means saddle in spanish, some species have saddle shaped carapaces).
Both species seem to be fairly hardy and do well on cactus and yard forage. I supplement mine with seaweed once a week to avoid goiter. If you have the time, money and room, I think they are the coolest reptiles to keep.