I it's ease of threading that interests you, Babykock is the way to go. They are great machines and stitch wonderfully.
But, regardless of the brand, your dealer will help you learn the threading mechanism. And once it's threaded, the threads on the other brands can be tied off and fed through the machine easily. You only get into trouble if you break a thread and have to thread them manually. My suggestion is to visit a few dealers of different brands and make you decision on the features that meet your needs. Just my humble opinion!!!!!