Other than the fact that it has:
- Multiple patterns (omni, fig 8 and cardiod)
- the lowest self noise of any mic I own
- sounds amazing on male vox (usually beats out my Neumans).
- and comes with an excellent shock mount, an aluminimum case and a plus velevet sleeve.
- sounds excellent on acoustic guitar, kick drum, upright bass, piano and sax.
It is pretty good. But then again I think you were seeking other opinions than mine.
I have two KSM44s and two KSM32s. Very different, both very useful. The 32s are wonderful acoustic instrument mics, great drum overhead mics, nice amp mics (perhaps a little bright..) and great female vocal mics. The 44s are great male vocal mics (screamers welcome!), good room mics, nice fat amp mics and very useful on thinner sounding acoustic instruments (mandolin, banjo, harmonica, some violins, odd percussion bits). Use 'em both all the time. My current most-often-used vocal mic is a house brand multi-pattern tube sold by Pacific Pro Audio (pacificproaudio.com).
The artist that I worked for, for the past two yesrs is Junior Brown, He has a Shure endorsement. I have nearly everything made to use.
I like the KSM 44. I use the 44 on an Ampeg SVT/JBL 4x10 cab and 1x15 cab. I have recorded Junior with the 44 and it was great. For the Buddy Lee Jean commercials, we used an AKG C414TL, and the 44 smoked it.
The difference between the 32 and the 44 is not just the extra patterns. The 32 is a small diaphram. It is the same small diaphram that is in the KSM137 pencil mic.
I use a 32 for snare top and bottom, and a KSM137 on cymbals. I have used 44's and 32's on guitar, guitar amps, etc. I still prefer a 57 on live guitar amps.
No mic is perfect. But if you want a mic that has little character of it's own, then the 44 is great..