I'll post a more limited (in terms of number of devices) voice test as soon as I get a chance - good suggestion. I'll put it in the H2e thread as it will be more targetted at that particular device. Straight out of the recorder I don't expect it to sound competitive. I think the choice of hypercardioid capsules for the front and back may not help it. Note that the venerable Sony M10 was quite bassy, almost too much, but that uses omni capsules which tend to be bass heavy (I believe). The opposite of hypercardioid. The stereo image from the H2e was perhaps the best, however. The Sony A10 sounds very good to my ears, and its tiny size does not seem to place it at an obvious disadvantage. Also the Zoom H1N surprised me - given its miniscule price, it's not too bad at all in real world conditions.
Given that in the last sample, the H2e with low frequency (LF) added in the editor sounded rather better than the out of the box sound, I wonder why Zoom didn't just build that into the mic preamp? Hmmm.
As for that official Zoom sample recording, I can't believe they stuffed it up like that in the first place, and then they haven't taken it down. Marketing rather than engineering did it I guess.