The Ninja Foodi XL Pro Griddle & Grill IG601 and Ninja Foodi Smart XL Grill IG551 are popular indoor grills. Both cook tasty meals. Both save space. But they have differences. This article compares them in detail. Read on to find the best one for you. Ninja Foodi XL Pro Griddle & Grill IG601 Product Details The Ninja