Side-by-side specifications of the Synology RS2212+ and RS2414RP+, from official datasheets. Differences are highlighted.
| RS2212+ | RS2414RP+ | |
| CPU | Dual Core 2.13 GHz | Intel Atom Dual Core 2.13GHz |
| Cores / threads | 2 | 2 |
| RAM (base) | 1GB DDR3 | 2GB |
| RAM (max) | 3GB | 4GB |
| Drive bays | 10 | 12 |
| Expandable to | 22 | 12 |
| M.2 slots | 0 | 0 |
| Network | 2x Gigabit | 4x Gigabit |
| 10GbE | no | no |
| Max raw capacity | 66TB | 144TB |
| Hot-swap | yes | yes |
| Form factor | 2U | 2U rackmount |
| Released | 2012 | 2014 |
Choose the RS2414RP+ if you need more headroom: it has the stronger CPU, higher RAM ceiling, more bays, and is the one worth pairing with expansion. The RS2212+ is the smaller, cheaper option, but it falls behind on performance and scalability.
Neither model has built-in 10GbE or M.2 support. If those matter, you’d need a different Synology model or add-on networking where supported.