I just received my pair of SE535's today and have listened for a while now...
As a very long time fan/user of the SE530's, I can honestly confirm that the sound signature is indeed a bit different than the 530's... albeit, not too drastically so.
Like the 530's before them, the 535's are on the warmish side, even a bit moreso than the 530's, I think.
Also, the bass is definitely more pronounced/up front...not in an exagerrated way but certainly ticked up in the mix over the 530's more neutral bass. In fact, for most music, I no longer feel the need to use my Arrow amps bass boost in the least as the 535's default signature sounds about like the 530's with the Arrows bass boost enabled (setting 1). The bass is without a doubt of the same flavor as the earlier 530's, but there's more of it.
The treble/highs is as well slightly more present; this is a welcome change in my book.
And finally, strangely enough because I had doubts about this, the sound stage/spatial qualities of the sound are ever so slightly improved as well.
All in all, I'm pleased. The slightly different tuning will take some getting used to as my brain still expects the super flat/neutral tone of the 530's but in the end, I think the 535's, though employing the same drivers as the 530's, is nonetheless a slightly bit more refined design than is the earlier Shures...
And the detachable cables are awesome.
Rock.
.joel