It’s different. The GPU is broken into several parts and integrated into the SoC along with the CPU’s dedicated processes. Data is passed within the SoC without entering UM. It’s exclusively used as a storage liaison.

You should check out Apple Silicon M-Series. Specs don’t translate to performance in the way conventional PC architecture does. I guarantee you’ll see PC manufacturers going to 2nm SoC configurations soon enough. The performance is undeniable.