It's hard to tell the the specific difference architecturally...

It's hard to tell the the specific difference architecturally non filamentry ReRam will have in relation to filamentry. I prefer to sit on the cautious side of any statement.

Various filamentary ReRAM platforms exhibit variability in performance and reliability due to the formation and dissolution of filaments, which can affect endurance and data retention.

Non-filamentary ReRAM technologies should offer advantages such as improved endurance, faster switching speeds, and better overall reliability compared to some filamentary ReRAM technologies, in theory they should be less susceptible to dielectric breakdown also. There is obviously far less published data here because well hardly any developers have successfully delivered this ...