[honcho]

Hey guys... im looking to run Kodi on a Raspberry Pi running OpenElec simply for it to be notified of new material so that it can then send that updated material to an SQL database so everything syncs across the house...
Im also looking to run MySQL on a second Raspberry Pi running Ubuntu Server

Both devices will be uninterfaced items (no monitor, no keyboard, no mouse... just little computing boxes tucked away in a corner)… both will be networked wirelessly...

One RPI is an RPi3 B, the other is an RPi3 B+

Is there any real benefit to running one platform on one piece of hardware vs the other piece of hardware? Would it be 'snappier' if say, the SQL was run off of the slightly better equipment? or is it so negligible that it doesn't matter?

(I also have a few RPi 0w laying around... but they don't do great at running Kodi… so have avoided them for this project... not opposed to using them for SQL if that is an application they are perfectly suited for..)

Any recommendations are appreciated.

huh. Why would you be running Kodi on something that doesn't have a monitor on it?  

Im sort of at a loss that this is a question...

A headless kodi can receive updates from sonarr when something is downloaded and added to a library... kodi will then notify an SQL database that the other kodi machines hooked into the same network call on, thus not needing to update every single Kodi's library every time you need to see what's new, you simply open kodi or back out to the home page and bam, already updated...

So... the way my system works... FreeNAS runs a VM version of Ubuntu that hosts all my little programs... Sonarr, SABNZBD, MySQL...etc. When it downloads something and sends it to the storage drive, it then notifies a headless Kodi device, which then automatically updates its library and then sends that information to the MySQL database that tracks everything... As soon as it does that, the other Kodis on the network can see the update because it draws its menu information from the MySQL database rather than its own individual library database... means I don't have to update 10 different machines, only 1... and it can run endlessly updating itself without bogging down a machine im watching. 

my kodi's all scan my NAS and detect new media on their own.