Subjectively the 818v3 is cleaner, most noticeable to me in the bass/lower mid: this is running in the 5200SE + DSW (2.1) system streaming (ID41) Tidal through Roon (did not test the G08 or 500v3).

Depending on the Recording/resolution the 218 very close (sometimes more pleasant), higher resolutions the 818v3 seemed to sound cleaner/more resolving.

As default the 218 LPS is running the main system, sadly the 818 does not fit in the shelf. Standard 218 to LPS 218 was a big improvement; 218 LPS vs 818v3 is less so.

More superficially; No loud relay clicks on resolution change and a Very small footprint (active minimalism), wins for the 218 LPS.

My 218 build used a Power One medical MB12-1.7a with a double filter schneider IEC fused plug ~ hardwired directly with shielded servo power cable into the 218 pcb (no connectors).

Could most likely mod it a bit, but the power one has some decent parts and very good regulation.

The system is connected to a Triplite 2400, for filtering and sag protection (we have lots of power dips, not ideal).

Roon set up is not ideal ~ an AP on my wireless provided the hardwired connections and runs on my windows PC for the moment... Will try for some CD testing this weekend!

808v6, 818.3, G65, G61RSL, G91DH, G08, G98DH, 500v3, 504, 218-LPS, 218, 210, MS200
8000uSE, 5200SE, 5200HSE, DSP5200 (nonSL~fully rebuilt w/ Excel tweeters), DSP3300x2, DSW.2
HD621, Pair of Revivers, AC12