Is that H265 (10-Bit)?
Yes, h.265 x.265 and HEVC are pretty much the same thing.
Also, I have to use a GUI as I don't know how to use the command line version of ffmpeg.
To do any remotely advanced setup you have to add command line switches to your favorite gui anyway, so now's as good a time to learn as any.
With very very loose definition for the word "give".