Synology 918+ vs SonicTransporter i5

I’m currently running Roon Server on a MacBook but am considering moving to a centralized device. I have a Synology DS 412+ which houses my music files but I don’t think it has the power to run Roon. The options I’m considering are to continue to use the 412+ and add a SonicTransporter i5, or just replace the 412+ with a Synology 912+ with 8gb ram and 2x256 SSD drives (along with the 4 x 3 Tb storage drives from my current NAS). I’m leaning towards the one box solution, the 918+, but are there any trade offs in sound quality?