Lots of benefits, little to no smell for one.

Any primer or paint, be it lacquer or acrylic, is going to take 24-48hrs to cure (usually 24hrs is fine) and enamel primers and paint much longer.

Tamiya and Mr. Surfacer is lacquer based, so has about the same cure time as Vallejo.

Vallejo is less expensive to buy, as well you use alot less of it because you are airbrushing it on as opposed to fogging on the other stuff wasting 1/2 of it in the process. Also easier to clean, and doesn't eat up the seals in your airbrush.