I assume your don't listen to "test records" and since you own both arms, why not just keep the arm that sound best to "you". You don't need published reviews to validate your decision. Trust your ears.
Micro Seiki MA 505 vs Triplanar MK VII UII
I have both of these arms and was considering selling the Micro Seiki, I have read some good things about it. It just doesn't get that much play these days. I don't need to sell it but as I said it doesn't get much play and maybe someone else could enjoy it. I can't see putting a expensive cartridge on it to compare it to my triplanar/Sotto Voce cartridge setup just for the sake of knowing so any insight would be appreciated!!!