Thanks @akg_ca @tablejockey
Yes you are probably right that the sonic difference is very small between Heimdall and Tyr compared to the big price jump.
My system; Bryston BDP-3 streamer, Esoteric K-05XD SACD, Diablo 300 amp driving a pair of Maggie 3.7’s. I’m now leaning towards the Heimdall 2.