If it was me I would not buy either, but then I'm not fond of C02.
To me CO2 is just a way the guns manufacture figured to get more money out of their customers.
If you want to seriously shoot Pistol then think serious, like this. http://www.crosman.com/airguns/pistols/PC77B
If your buying it just to have it hang on the wall and look good, then feel free to ignore me.
I currently have several BB guns, all spring action, for cheap, indoor wintertime shooting. (Keeps my hands and eyes in practice. They are not terribly accurate, but they are good enough. I have 1 bb gun rifle, spring action, IT is accurate.
I have also owned a Sheridan Blue streak rifle in 5MM for near 40 years.
This is one sweet shooting, rugged, dependable air rifle. It will knock the socks off any BB gun in power, penetration, accuracy. Only downside is the ammo has slowly over the years gotten to where it is not cheap. And it is harder to find except via internet sales. It has adjustable power by means of a forarm pump. 2 pumps will kill a sparrow at 10m, 3 works fine for starlings on a overhead wire at 15- 25 m. 4 pumps will cleanly kill a rabbit out to 50 meters.
So you have to ask yourself what you want, and why you want it.
Image = nothing, "cool" = nothing.
A rifle that will go out and kill game to feed you or the family, quietly, without need for CO2 cylinders that might run dry. Or that will keep varmints out of your food supply. Now in the long haul, that is worth something.