These two NAS units are designed and marketed to those who don't require much storage, won't do intensive tasks, or are new to connected storage. They're affordable, but capable and can hook up to many external services like Plex.
Battle of the NAS
These two affordable NAS models from Synology and QNAP may look similar but differ in numerous areas when you look at the specifications sheet. For instance, the processors are different Intel Celeron SKUs, with QNAP's processor sporting a further two physical cores.
This doesn't really matter in the grand scheme of things — you still won't be transcoding 4K content — but it does make a difference in general use, particularly with multiple accounts connected simultaneously.
|Synology DS218+||QNAP TS-251+|
|CPU||Intel Celeron J3355
|Intel Celeron J9000
|RAM||2 GB (6 GB)||2 GB (8 GB)|
|Capacity||24 TB||12 TB (60 TB with expansion)|
|Ports||2x USB 3.0
|2x USB 2.0
1x USB 3.0
If you plan on going above and beyond the maximum capacity of two drives (especially if configured as RAID) you will be able to hook up one of the supported Synology or QNAP expansion enclosures that offer additional drive bays.
If you are new to the game and don't know if you'll use the NAS on a regular basis, Synology may be the better option with its excellent DSM OS and affordable price. The QNAP TS-251+ isn't too far behind and sports better hardware internals, but it is more expensive. You'll be able to take advantage of a quad-core processor and the expansion of both RAM and storage.
Synology's DS218+ is an excellent entry NAS
Synology has done a great job with its range of NAS models and the DS218+ is a solid option for those starting out. Just because it's one of the more affordable solutions from Synology, that doesn't mean you will hit a brick wall when attempting to do some advanced configuration. You can even create your own media server.
DiskStation Manager is a reliable and user-friendly OS too, making it easy to get started. The only drawback to the Ds218+ is the support for two bays, which can become an issue if you quickly fill up available drives.
Powered by the best NAS OS.
You're going to love the software support from Synology. DMS is excellent and very easy to grow accustomed to. The hardware is also reliable and well-built, making for quite the budget-friendly NAS.
QNAP is the best choice if you need something more
Much like Synology's DS218+, the TS-251+ from QNAP is one of the more affordable NAS models from the company. And just like the competitor product, QNAP includes the same Celeron processor, just a different, more powerful SKU with four cores as opposed to only two. Sporting better specs overall, as well as a higher price, you'll want to go with QNAP if you know you'll need more.
Rocks slightly faster hardware.
While some may say Synology edges out QNAP in the software department, the company hits back with the hardware, offering a remote control and a slightly faster CPU. Both don't make a massive difference but may sway your decision.
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