Early teardowns reveal that the M4 Mac Mini uses slotted modular SSDs, rather than soldered-on memory. This modular system means that storage upgrades are technically feasible, but Apple's proprietary SSD design makes upgrades a non-starter for the average customer.

To be fair, both of those other computers have significantly more memory bandwidth than the Mac mini, and both have better GPU performance. If maxing out as many GPU cores as possible is important to you, you’re probably better off with an M4 Max, which means either a MacBook Pro or waiting for an updated Mac Studio.