Side-by-side specifications of the Synology DS213+ and DS215j, from official datasheets. Differences are highlighted.
| DS213+ | DS215j | |
| CPU | Marvell Armada XP MV78230 dual-core 1.0 GHz | Marvell Armada 375 dual-core 800 MHz |
| Cores / threads | 2 cores / 2 threads | 2 cores / 2 threads |
| RAM (base) | 512 MB DDR3 | 512 MB DDR3 |
| RAM (max) | 512 MB | 512 MB |
| Drive bays | 2 | 2 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit Ethernet | 1× Gigabit Ethernet |
| 10GbE | no | no |
| Max raw capacity | 8 TB (2×4 TB) | 12 TB |
| Hot-swap | yes | no |
| Form factor | tower | desktop |
| Released | 2013 | 2015 |
| Power consumption | 18.4 W / 2.6 W | — |
| DSM at launch | 4.2 | — |