my thoughts are as before, but i will flesh them out this time...
1) "much better power supply..." followed by "just listen to it"... classic suggestive repsonse from the writer of the email... i.e. "obviously it sounds better!"...
question 1: why does it "sound better"? either the power supply supplies power, or it doesn't... the old saw about "toroid vs. non-toroid" can't even be used here, as both power supplies are the same design...
question 2a/b: what are these "higher quality parts"? and how do they affect sound quality? there is no mention of this in any of the sr7005 product literature, which is must be said is rather boastful about the unit's features... certainly if the power supply was exceptionally robust, it would be touted in at least the cut sheet, as a major complaint about today's avr's is the lack of robustness... especially compared to the good old days, when we walked to school uphill both ways carrying 100 pound amplifiers on our backs...

which, fwiw, i am sadly old enough to remember...
2) tuned how? for all intents and purposes (audibility), the 3311 delivers a flat frequency response from 20hz-20khz... is the writer of the email saying that ken intentionally altered a flat frequency response to be non-flat? if so, that would be rather disappointing...
3) there is NO platform between the 3311 and 4311... that the writer of the email does not know this should give one pause when it comes to his/her credibility when it comes to subjective commentary and undefined "parts improvements"...
4) true, the faceplate is different... rather attractive, imo... i really liked the way the av7005 looked in my rack... i would actually go as far as saying that other than the susano (the lcd on the susano RULES when it comes to "looks"), i can't think of too many pieces of a/v equipment i've owned that were more "visually pleasing"... certainly MILES better than the integra 9.9 pre-pro it replaced, which was so ugly that i priced it at a ridiculously low price because i couldn't wait to get it out of my house...
that doesn't affect actual sq, but can affect perceived sq... in a sighted test, i bet i'd choose the av7005 over the integra every time... even though in a bias controlled test, i'd have no chance of doing so reliably...
5) true. possibly useful to some. no improvement in sq, in fact, almost certainly a detriment if used, as they cannot be digitized and fed theough the dsp.
6) no idea, and don't care... both of them are worthless to me, i haven't used an oem remote in years... given my choice of an oem remote though, i'd likely choose the "simpler" of the two... to me, "programmable" oem remotes are pointless, and more trouble than they are worth...
fwiw, it's possible he left out another difference, although i am not sure... at least vis a vis the av7005... the av7005 has more component video inputs than the 3311... i do not know if this is true of the sr7005... when the unit came out, this was actually a valuable feature to some, as the vagaries of hdmi were yet to be worked out with many source components, and the ability to connect those components via component for video was helpful...
there are also some other trivial differences...
you asked what we thought... there's a lot more information that "we" have collected/reviewed/dissected/etc. than an email from some website... this isn't the first time this subject has been broached... so don't shoot the messenger...