Side-by-side specifications of the Synology DS419SLIM and DS420j, from official datasheets. Differences are highlighted.
| DS419SLIM | DS420j | |
| CPU | Marvell Armada 385 88F6820 | Realtek RTD1296 |
| Cores / threads | 2-core | 4-core |
| RAM (base) | 512 MB | 1 GB DDR4 |
| RAM (max) | 512 MB | 1 GB |
| Drive bays | 4 | 4 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 2x 1GbE RJ-45 | 1 x 1GbE RJ-45 |
| 10GbE | no | no |
| Max raw capacity | 20 TB | 64 TB |
| Hot-swap | yes | no |
| Form factor | mini cube | desktop |
| Released | 2019 | 2023 |