Here are 2 old Sonic plushes from the company "News Power".
This company is in China, but then also (Seems to) have only sold their stuff there as well. These are older 90s era plushes from when it wasn't recognized how Sonic's spikes went, so everyone was just doing the 3 rows of felt strips right in the middle. (Like Caltoy & etc in the USA too) It apparently came in 2 sizes big, and medium (inset).
The dolls DO have the right amount of fingers, the one in the photo is missing his string (you can see the hole/missing bit in the original) and they both have shoe buckles. (America classic ones skipped those) So, while the head is overly round & the spikes are wrong, this plush is more a product of it's era.