So I swapped the M1 Mini 8gb for the M1 MacBook Pro 16gb. Rendered the Grapes scene in 4mins, 47sec. I have a few background processes running for audio interface, thunderbolt dock, and network monitoring (my daily needs), but it still ran well compared to the results mentioned above with intel machines. You can see the fans did ramp up quite a bit, the CPU was at 100% as I guess it normal for rendering. I think the MacMini may do a little better because of thermals. I guess this would be a great modeling machine? Perhaps Apple's tower may be more interesting for rendering.
Here's the results attached below. The iStastistica screenshot was taken around 4 minutes into the render.