Well, using the Default Scanline Renderer with supersampling set to Hammersley you get a very high quality normal maps and it’s fairly quick, with full control over the cage.
Using something like Vray to bake textures allows you to bake high quality lighting to a texture map, or reflections or whatever depending on the look you’re going for–note that it’s not possible to bake your lightmaps in another program and use them as lightmaps in UE4
Honestly either program is fine if you plan on going that route for a more expensive software. If you want to get into film though, Maya is dominant there. In gaming I’d say at this point that it’s 50/50 between the two.