Re: HELP! sm-1 mini humbucker - slightly mushy on the lower strings
I had a mini-hum in the neck of an esquire and I loved it. It did sound soupy compared to the stock tele pickup in the bridge though. That's how I liked it because I'd play the bridge PU 90% of the time and turn to the neck for goopy gain. When I switched out my bridge PU for a Little 59 the dark, soft tone I loved on the mini-hum disappeared, and it seemed bright and clangy.
I think Benjy hit the nail on the head - it's not the pickup per se, and your setup doesn't sound like it would tend towards mushiness, it's the contrast between the two pickups. Of course there could just be someting about the tone of that pickup that you just don't like..it happens to everyone, even with great gear.