Weird ? about small block pulleys

So my 360 swap is coming along. I don't know if this sounds dumb but I have a couple of different size crank pulleys. I believe the larger diameter came off the 360 and the smaller one from a 318. Is there an advantage from one over the other? My 360 is basically stock except for an aluminum intake, 4 barrel and headers. The cam is the basic towing spec cam for more torque. I'm just curious as to what pulley is better.