Side-by-side specifications of the Synology DS213+ and DS220j, from official datasheets. Differences are highlighted.
| DS213+ | DS220j | |
| CPU | Marvell Armada XP MV78230 dual-core 1.0 GHz | Realtek RTD1296, 1.4 GHz |
| Cores / threads | 2 cores / 2 threads | 4 cores / 4 threads |
| RAM (base) | 512 MB DDR3 | 512 MB DDR4 non-ECC |
| RAM (max) | 512 MB | — |
| Drive bays | 2 | 2 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit Ethernet | 1x 1GbE RJ-45 |
| 10GbE | no | no |
| Max raw capacity | 8 TB (2×4 TB) | 32 TB (2×16 TB) |
| Hot-swap | yes | no |
| Form factor | tower | Desktop |
| Released | 2013 | 2020 |
| Power consumption | 18.4 W / 2.6 W | 12.46 W / 5.06 W |
| DSM at launch | 4.2 | — |