Guest,
You’re going to have two totally different bakes. Gas and electric or on opposite ends of the spectrum from each other. Electric ovens tend to be a little drier and the pizzas will cook a little darker. Gas keeps the outer crust softer and you’re cheese will have a better appearance.
As far as bills, I had one store with two Lincoln Impinger (I think they’re 1142’s) electric ovens. This store was approx. 800 sq. feet and the electric bill was consistently around $900/month.
My Junction City store has a Middleby Marshall PS220 double stack and my electric bill runs around $300, gas around the same. I’m sure I don’t have to tell you, but these ovens are EXTREMELY inefficient yet my combined bills are lower than the previous example.
Therefore, electric will be cheaper to install, however it looks like gas will save you money in the long run. With that said, the question you should ask yourself is if you can afford to run gas lines now to save you money later. If the answer is yes, I would suggest you go with gas.
-J_r0kk