256GB Mac mini' with M2 chip has fewer chips than the previous generation, so it turns out that SSD speed is slow, 512GB MacBook Pro with M2 Pro also slows down -
Theoretically, you can upgrade RAM & SSD on your M1 Mac mini, but you shouldn't | AppleInsider
Configure a Mac Mini (2018) for Video Editing | Larry Jordan
The 2018 Mac Mini – Marco.org
2018 Mac mini Teardown: User-Upgradeable RAM, But Soldered Down CPU and Storage - MacRumors
Apple Silicon M1 Mac mini review - speed today and a promise of more later | AppleInsider
2019 256GB MacBook Air has a slower SSD than 2018 model
Mac mini 2018 review: Apple's most versatile new Mac [Video] - 9to5Mac
Mac mini 2018/2020 SSD | MacRumors Forums
Mac Mini 2018 teardown shows swappable storage traded for memory upgrades - CNET