A good pneumatic has power and speed of reload over a good band gun.
No, a good pnuematic does not have more power than a good band gun. The old Scubapro guns (now Bandito) and the Riffe Metal Tech #1 are short range guns that aren't designed to shoot far or take down large fish. That's not an apples to apples comparison.
I think your opinion would be different if your current gun was a Riffe Metal Tech #3. This notion of comparing power of band guns to pneumatic gun would not even have occured to you if your current gun was a Riffe Metal Tech #5.
<For those of you who did not know...Riffe guns have a "0" to "5" size/power scale. "0" is the shortest and least powerful gun, and "5" is the longest and most powerful.>
Regarding reload time, I've seen people use a single 3/4" band instead of two or three 9/16" bands for quick reloads. I think this is how the a lot of commercial and competition guys set up their guns.