Knowing the PC1 and reading Myles' review it seems the issue was the way in which the Pulsare exacerbated the Air Tight's tendency towards an over forward low/mid bass -- this cartridge has a pronounced bass hump that is quite euphonic but also is quite demanding of the arms it is mounted on, and may also overload the phono stage. I suspect what was happening here was a mismatch between the cartridge and arm, and a phono stage that added a tinge of richness to the low/mid bass range (note that the review implies that the Pulsare is neutral to thin in the mid/upper bass).
So if your system tends to the lean and a tad bass shy then this may be a good combination. You can also play around with damping on your SME to tailor to deal with this issue
So if your system tends to the lean and a tad bass shy then this may be a good combination. You can also play around with damping on your SME to tailor to deal with this issue