Replying to Should I buy a stove that uses ISOBUTANE or PROPANE for car camping?

I'm either going to get the Coleman Cascade 222 or the Primus Tupike stove. The coleman uses the green propane bottles that you can get at walmart and even farming stores and ACE hardwares in small towns. The primus uses the isobutane canisters that you can usually only find at backpacking stores. But that's what my MSR backpacking stove uses anyway so it might be kind of nice to just have one kind of fuel in my gear closet.
IDK... I can't make a decision... Please decide for me.