I'm not a technical person, so can't provide frequency courves. But what I can say from the LS-10 and the LS-11, first hand, is this:
- Sound of the LS-10 was thin, good for speech, music had to be equalized.
- Sound of the LS-11 is full and has wonderful bass, but is also nice in the highs, both from internal mics, and mic-in. speech is clear and deep, music doesn't have to be post processed. It's the deciding difference to the LS-10. But I understand if you don't believe, and wait until somebody can provide the graphs to prove... it's just my ears :-)
Some more points on the LS-11:
- Oly uses AA instead of AAA of the Sony. I have more of them.
- Oly uses SDHC instead of microSD. Dito.
- Battery life of the LS-11 is more than good enough. The M10 has some more hours. I don't care.
- LS-11 is lighter and I prefer the form factor to the M10.
- Startup time is short: 2 sec with 8GB internal RAM and 4 GB SDHC.
As I already have an LS-11 and being completely happy with, also for music, I'd need a good reason (improvement in sound quality) to also buy an M10.
Maybe I should get one just to compare... Does anybody have the two?