I've eaten at Jaleo and Homecomin', but not Morimoto. I loved both.
Jaleo was more expensive. Our group of five shared endless tapas, a pitcher of sangria, and two desserts, leaving absolutely stuffed, paying about $60 each, with a 20% discount. Service was top notch. Food even better. Didn't have a bad bite of food the entire meal. My friend who has been to Spain and was excited to revisit the cuisine said they were the best croquettas she's ever tasted. She left impressed, and that's hard to do. I'm a bit more easy to please.
Homecomin' is wonderful and you will also leave stuffed, while paying a little less. The fried green tomatoes are an all time favorite Disney appetizer of mine. The food will stick to your ribs. It's quite hearty and heavy. I grew up with this kind of food and it's some of the best I've ever had in a restaurant. Great service in my experience as well. I dined solo both times I was there and the servers made me feel right at home.
Price - Homecomin' has been less expensive in my experience
Atmosphere - Jaleo was a bit "nicer" and Homecomin' more casual
Food - You can't go wrong with either