Side-by-side specifications of the Synology DS118 and DS218, from official datasheets. Differences are highlighted.
| DS118 | DS218 | |
| CPU | Realtek RTD1296 | Realtek RTD1296 |
| Cores / threads | 4-core | 4-core |
| RAM (base) | 1 GB DDR4 | 2 GB |
| RAM (max) | 1 GB | 2 GB |
| Drive bays | 1 | 2 |
| Expandable to | 0 | — |
| M.2 slots | 0 | — |
| Network | 1x 1GbE | 1x 1GbE |
| 10GbE | no | no |
| Max raw capacity | 10TB | 20TB |
| Hot-swap | no | yes |
| Form factor | desktop | desktop |
| Released | 2017 | 2018 |