Side-by-side specifications of the Synology DS110j and DS111, from official datasheets. Differences are highlighted.
| DS110j | DS111 | |
| CPU | 800 MHz | 1.6 GHz |
| Cores / threads | 1 core / 1 thread | 1 core / 1 thread |
| RAM (base) | 128 MB | 256 MB |
| RAM (max) | 128 MB | 256 MB |
| Drive bays | 1 | 1 |
| Expandable to | 0 | 0 |
| M.2 slots | 0 | 0 |
| Network | 1× Gigabit Ethernet | 1GbE x1 |
| 10GbE | no | no |
| Max raw capacity | 3 TB | 3 TB |
| Hot-swap | no | no |
| Form factor | Desktop | Desktop |
| Released | 2010 | 2010 |
| Power consumption | 19 W / 9 W | 18.7 W / 7.7 W |
| DSM at launch | 2.2 | — |
Choose the DS111 if you want the more capable box: it has the faster CPU, more RAM headroom, and is the better fit for heavier home/SMB use. Both are single-bay units with no expansion, and neither supports 10GbE or M.2, so the DS111’s performance and memory are the only decisive advantages here.