The machines listed are all very specialized machines. Many of them have one or two uses. What your machine does, it will do well! The US 7227 on the other hand can be used for design transferring pressure fusing, and ironing.
Machines are also designed to be used with specific fabrics. Some are perfect for printing or fusing on pants. Others are made for design transferring on shirts or fabrics. There are a few machines that are designed for any kind of fabric.