The biggest difference in my opinion is cost. In the beginning you’ll find the electric ovens cheaper in the start-up phase. However, you’ll find that once your store’s running the electric bills are more expensive. I ran one store with electric Lincoln Impingers and the electric bill is constantly in the $800-$1000 range (1200 square feet).
Gas ovens are a little more money but I’ve got a store around the same square footage and my electric bill has been averaging about $350 and gas about $250.
As far as final bake, I really don’t see too much of a difference. If anything I’d say the gas ovens cook a little better. -J_r0kk