All kamado's have pros and kons , I've sold and owned several! I'll just list the pros for the ones I've owned
BGE has several accessories , aftermarket and oem
Primo has a unique shape and is made in the USA
Grill Dome has thicker thicker ceramic , stainless hardware , spring assist lid & different colors.
All are great grills and smokers , just different features!
Primo XL Oval/80 gal Big Pappa Drum/Pit Barrel Cooker/ Assassin 28