Looks like the C8GS is getting a bigger production share compared to when the C7GS came out (Stingrays had a 41% total share in 2017 vs. 36% for the GS).
Also interesting to note that the C8GS represents a 23% premium over a base model, while 10 years ago it was only an 18% premium. Considering that Corvette price increases have exceeded inflation over that same period, it's clear GM is wanting to inch the brand further upmarket.