Propane burns at lower temperature (I think), but you can always turn the regulator higher, if needed. I converted my backpacking Primus stove to accept green Coleman 1-pound propane canisters because they are cheaper and easier to find. Any hardware store in the US and most stores in Mexico, Central America and Caribbean will have green Coleman propane canisters, or sometimes - long blue canisters with same propane - those are used for welding.
The fuel in Primus or MSR canisters is a mix of butane, isobutane and propane. Green and blue propane canisters are pure propane. No problems with running Primus stove on propane. The only strange thing is that the propane canister makes clicking sounds from time to time and then flame flickers, as if something is boiling inside the canister or in the hose :)