I live 10 minutes south of Fort Mill SC so if C.Capitata x kousa likes it there it should like it here also. Are you from the Charlotte/Fort Mill area?
Thanks for the info on cornus kousa x nuttallii Starlight and Venus. They must be for ornamental purposes only. Looking at photos online of pure C. nuttallii fruit looks like what I would think C. florida x kousa would like.
However pure C.Capitata looks more like kousa and with it being crossed to kousa it should make the hybrid more heat tolerant than a pure Kousa and more hardy than pure C.Capitata zone 8. Here is a photo of the pure C.Capitata fruits. They look similar to Kousa but smoother and more juicy looking
There is also CORNUS KOUSA VAR. CHINENSIS that makes yellow and orange fruits. MANDARIN JEWEL is one named variety and it looks like a must have.