Just picked these up and the Kikuchi is right up to the edge for me, the A side being more 'out' and the flip being more modes and melody...SQ does vary between the two, it may the 'live' nature of the Kikuchi record, but its not an amazing recording SQ wise, the Muraoka record is better...his horn while well recorded is a placed way in front of the other band members with the keys panned hard left. It's got a strange clinical feel to it... I feel there could have been a touch more bottom end. But all in all better than most and if you can get it close to 4000Yen its definitely higher value than anything else out there. packaging is superb as is typical of Maruyama-san, the only quibble would be that he doesn't do replica labels (although they sorta look like old Philips ones).
If only we could start to see more of these on a regular basis.
I see that DustyGroove has these at $70 which is starting to get ridiculous. Sigh.