SSC = soft structured carrier. like the ergo, for eg.
mai teis are pretty similar, really, but they tie up, rather than having buckles.

Mai Teis are all pretty similar, really, but can vary from very plain and basic (and cheap) to quite expensive - often due to the materials used, rather than design differences, though there are differences in the length/width of straps (whether padded or not, or 'wrap style') and the size and width/shape of the square that holds the baby in.

I liked my ergo at first - very comfy on the front. But not on the back. Cant' adjust the shoulder straps enough and the waist strap digs in. So would prefer an MT. i have tried a half-buckle, with a different sort of waist strap/buckle and wrap-style shoulder straps (that tied) which was waaaaay more comfortable to use.

anyway, looks like you've found something to use....