ArtistGardener
Aquarium Advice Freak
Yes, they would do OK together as they are basically the same fish--wild version vs bred types. I'm not sure you would want to mix them. The Endlers are smaller than fancy guppies. If you are sold on Endlers, I would get CPDs and shrimp to finish the tank. Everything will be small here--maybe too small--a centerpiece fish would be nice.