[shake]

Does anyone happen to know the difference between S-Logic and S-Logic plus?  As far as I know, S-Logic Plus was introduced some time in 2008 to replace S-Logic.  I haven't seen much coverage (pics or otherwise) of Ultrasones here, so searching turned up nothing.
 
Here is a pic of the post 2008 layout of the HFI-780s, I apologize for the horrendous quality:

 
Also, let's not turn this into a debate of whether S-Logic is snake-oil pretty please .

 

[12thgear]

I could be mistaken, but I thought the primary difference was one of packaging. That is, S-Logic Plus offers the benefits of S-Logic in a more compact design. 

 

[shake]

What do you mean by a difference of packaging?  Are the cups of the new models smaller than the older models?

 

[oqvist]

S-logic plus is supposed to be compatible with more ears then S-logic.
 
The ear cups was different compared to my Proline 750 and Pro 900 except for the FR response of course. But the Pro 900 had a slightly bigger soundstage... Again may just been to the slightly larger size.