All models are real all-rounders (baking, grilling, cooking and more). The workmanship and attention to detail are identical. The only difference is the size. The Merklinger 600 offers you a 60 cm x 50 cm baking/grilling/cooking surface, the 800 has an 80 cm x 50 cm baking/grilling/cooking surface and the 1200 is the really big one with a baking/grilling/cooking surface of 120 cm x 70 cm. The Bobby is the compact Merklinger with a baking/cooking surface of 54 cm x 42 cm. You can find a detailed overview here: https://www.dermerklinger.de/der-merklinger/