Tom, both are with Corona high quality denoiser... It's frame at 1280 by 720, and, as you see, the characters are alpha plane, so no problems! I don't know if it helps, but the difference is immediately seeble, as the i9 start immediately, and pass 2, with a less grainy picture, and, how to explain, homogeneous... The only thing I didn't try is to re install windows, but all the other components are freshly installed, and drivers are updated... th i9 is the "first low" of the series, and the i7 was one of the best i7, so they aren't so far one from one another!!! it's a (painful) mystery!
the c4d is r20 studio, and Corona the 5 hotfix 2...