They are all similar in design and construction. I've cooked on a Carolina Grill. They are a solid unit.
I would look at the features you want on a grill, including total weight, cooking grate size, burner style, ease of cleaning, how it handels grease flow, etc. Then, I would look at service after the sale. Can you get the cooker back to the fabricator if something isn't quite right? Local might be a consideration.
If you are going to have a Barbecue, something has to die.
- Ted Nugent.