HPA is almost always the better choice, like mentioned above.
Most guns can lower the pressure of the air through an inline or low pressure regulator. However, some guns, like angels, shockers, some timmys and some trix's will work better on LP.
Basically, HP is around 700psi and LP is 300psi ish. I believe, its been awhile since i REALLY worried about it.
In reality, no marker runs better on LP or HP. You can't really say a marker runs better on either, but rather the regulator on the marker. Example, lets say you have a regulator that can handle a HP tank and puts out 200psi. Both a HP and LP tank can be ran through this regulator. No matter which tank, the regulator will be putting out a constant 200psi., so how does it make sense to say that a marker runs better on HP or LP since the air goes through the regulator first?
However, LP tanks put less stress on the regulator on the marker (not the marker itself). So, over time, your reg MAY fail more often with a HP tank then with a LP one. But that's not really a reason to chose LP over HP.
I choose HP for any marker because you'll never have to worry about shootdown caused by an inconsistent tank regulator. Shootdown with a LP tank would come first on any marker. Plus you can use HP on any marker, low-ends cannot use LP tanks and shoot consistently, especially at high rates of fire.
As long as the regulator on the marker can handle the HP tank and lower the air pressure down to the marker's operating pressure, then you can use HP. And as long as the marker's operating pressure is atleast 200psi. less than the LP tank's output, then you can use LP, but it isn't for sure that you won't receive shootdown.
Oh, and the difference is that HP tanks put out 800psi. or more, and LP tanks put out around 400psi. to 450psi. This pressure cannot be adjusted on preset tanks.
the peanut is the perfect tank for anyone because it holds a little more air then a 68 ci so when you want a short tank to get your gun close to you but hate filling your tank every round get the peanut its great or get a dye throttle stubby same idea just dye tanks are very light
They're barely larger, shorter and fatter, yes. Do not get a Dye Throttle, their regs aren't good. Really only get a Crossfire or a Mac Dev LegionAir. They have the best regs on their tanks. And a peanut tank is not perfect for everyone, it's all about preferance. As I said, I like normal 68/45's better. You just have to try them out and tell yourself what you like. Same thing with drop forwards, rails, uni-mounts, grips, trigger frames, triggers especially, etc.