Spin looks about the same. 2169 for the 4 seamer 2153 for the sinker. Although that's its own tell, from looking at a handful of other sinkerballers (Logan Webb, Luis Castillo, Kyle Hendricks) the difference is usually higher by a lot more, Logan Webb was a couple hundred for instance. So on a relative basis I'd say you're right it has a good bit more spin.
The show tends to have damn near every pitch name available, and the way the make it matter is they use it is to break out which direction it moves. For instance if you look at a clock a running fastball would move towards 3 o clock, a 2-seamer towards 4 o clock, and a sinker towards 5 o clock. But realistically to your point those are all just variations of the same pitch.