Side-by-side specifications of the Synology DS107+ and DS108j, from official datasheets. Differences are highlighted.
| DS107+ | DS108j | |
| CPU | 500 MHz | — |
| Cores / threads | 1 core / 1 thread | — |
| RAM (base) | 64 MB | — |
| RAM (max) | 128 MB | — |
| Drive bays | 1 | 1 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit Ethernet | 1GbE |
| 10GbE | no | no |
| Max raw capacity | 1 TB | 1 SATA drive |
| Hot-swap | no | no |
| Form factor | Desktop | Desktop |
| Released | 2008 | 2008 |
| Power consumption | 17 W / 8.6 W | 27 W / 10 W |
| DSM at launch | — | — |
Pick the DS107+ if you want the stronger box: it has the faster CPU and higher RAM ceiling, while the DS108J is the slower entry model with less memory headroom. Both are single-bay units, so there’s no expansion, and neither offers 10GbE or M.2.