If you don't need to smoke, the CB is a better grill. It has a much larger surface area for grilling than the PG, and those super heavy cast iron grates put a sear on meat like nothing else.
That said, the PG IS more weather tight. You can't ever get the pellet box lid wet on the CB or you will end up with a pile of sawdust and pelletcrete. As some have said, it works fine under an outdoor roof, but if you are using it directly under the open sky, you can't ever use it in the rain. The PG doesn't have these issues.