Ok, I have just done a little ab-ing.
The Calrecs (CC56 capsule, with windshield_ are not that different from the KM85. The main differences would be:
- The Calrecs have less gain, so, depending on the preamp they can be a bit noisy when recording very quiet stuff (finger picked guitar miked at 1 m distance)
- The KM85 has a much more drastic bass roll-off, so it's more suited to extremely close miking (otherwise you should use some EQ to bring the bass back!). In contrast, the Calrecs are more balanced and have more bass, so you can use them further back. (this is for the CC56, I would expect the windshield gives it less proximity effect than the 1051, which is probably bassier)
- The Calrecs have a very slightly more hyped high end, but are actually not far from the KM85, I'd say they sound quite similar.
I might add a few samples to show this.