I have an M3 chip in my laptop, it has more memory than my 4090 but it's still way slower when inferencing. So as long as the model fits in memory, Nvidia GPUs are going to be way faster just because they have more/faster compute cores.

Of course, if the model fits in memory on your M chip and doesn't in your Nvidia chip, the M chip wins by default. However, I would say, if you load a 70B model in your M chip, while it WILL work, the tokens/sec will be slow as fuck... so it kinda doesn't matter anyway.