Especificaciones de los Synology RS408 y RS409 en paralelo, de las fichas técnicas oficiales. Las diferencias están resaltadas.
| RS408 | RS409 | |
| CPU | 800 MHz | 1.2GHz |
| Núcleos / hilos | — | — |
| RAM (base) | 512 MB | 256MB |
| RAM (máx.) | — | — |
| Bahías | 4 | 4 |
| Ampliable a | 0 | 4 |
| Ranuras M.2 | 0 | 0 |
| Red | 2x Gigabit | 2x Gigabit |
| 10GbE | no | no |
| Capacidad bruta máx. | 4 TB | 3TB |
| Intercambio en caliente | yes | yes |
| Formato | 1U rackmount | 1U rackmount |
| Lanzamiento | — | — |
| Consumo | 69.5 W / 25 W | 52.8 W / 23 W |
| DSM de lanzamiento | — | 2.1 |
I can’t reliably compare RS408 vs RS409 from the specs you provided, because both spec fields are empty. If you send the CPU, RAM max, bay/expansion, 10GbE, and M.2 details for each, I’ll give you a 2–3 sentence recommendation.