to be sure:
RS1219+ is little bit over performed vs
DS218+
and RS1219+ is 2U not 1U
reasons-
1. CPU:
when RS1219+ has Intel Atom C2538 ... advantages:
- 4 cores threads vs 2
- higher base clock speed (2.4 vs 2.0GHz), ok there is Turbo burst for Celeron to 2.5GHz
- supports Supports ECC
....
DS218+ has "just" Intel Celeron J3355
different point of view:
for similar price (or better) you can purchase better NAS than RS1219+ ... it is
DS1819+, reasons:
- CPU .. newest Intel Atom C3538 with same cores, but 8MB Cache (vs 2MB in RS1219+)
- RAM - DDR4 2400MHz (vs DDR31600 in RS1219+) ... include ECC
- SSD cache support for NVMe disks (doesn't supported in RS1219+)
and really better airflow (cooling) than for the RS1219+ ... when you will use rack w/o A/C
OFC ... 8bay vs 6bay
count all the horses before a purchase!