Never mind, James. Honestly. Please don't bother (waste time) testing the track above (I do mean it). I know what I'm hearing and all I can say is either the SUIs & KEADEs are more different than you and I thought, we're getting a different fit… or we simply value the strengths (and weaknesses) of these seemingly very similarly sounding phones differently. I really think the KAEDEs are an exceptionally good sounding phone (though, as noted already, not perfect).
Anyway, as it often happens, I had one of my many playlists on random mode, and these two tracks came on: http://grooveshark.com/#!/s/Hell+Of+A+Life/3mqJtM?src=5 and http://grooveshark.com/#!/s/Glory+Electricity/2v6Ndr?src=5
… and then it just suddenly dawned on me, "Wait, I know what I've been hearing all along, and what I've been hearing is seriously good. If people recognise the quality of the KAEDEs / F4s, great, if not, cool — who cares about whether people agree with me or not, anyway? My credibility (or lack thereof) matters little to me, TBH" One thing I've always appreciated about you, as you well know, is that you tell it like it is (unlike others who claim to do do)—and that is quite rare in this place with so much bias and plenty of BS—and you also know you and I haven't always quite agreed, but, more often than not, we often have. All I can say, though, is that if these two F4 models are sonically very, very close, the little respect I had for you has now completely gone out the window!
No worries, striktly speaking we don't disagree, 'cause I'm talking about the SUI and you're talking about the KAEDE. If it hadn't been for members who've heard both and said they're sonically close, I wouldn't have made my posts in the first place. (I disagree with you about your take on on Rin's work though, but that's a different and OT matter.)
Anyway, to wrap up my thoughts (knowing you've read my earlier comparison to the FX700), I don't regard the SUI as giant killers, but neither as bad phones. However, their sonic performance wasn't at all impressive enough to make me lust for the twice as expensive KAEDE, especially in light of their alleged similarity. So I'll just leave it at that, as an inquiring mind I'd be admittedly curious about how the KAEDE would measure compared to the SUI, but I can very well live without an answer to that question.