in addition to what i wrote earlier, i'm just guessing that its because of the added flexibility found in the Panno  which explains why there are more Panno systems adopted against the saemisch rather than the Byrne.

Alias, 

I think you're probably right, but the problem for White in the entire game was that he never seemed to have control of the game.  White was always dancing between consolidating his advantage and falling apart.  In the end, we know he landed on the wrong side. I do blame the opening to some extent for White's difficulties later on, but I want to see some professional analysis too.

Morozevich is primarily a 1. e4 player. Actually this is the first time i've seen him play 1. d4, and he played not at all badly (of course he is 2700!). His loss seems more like time-trouble than anything else. Svidler played well too, so a draw would have been a fairer result.

For me king-safety is of paramount importance, so am not  keen on the Classical, which i think is actually more  complicated than the Samisch. But I do follow Bayonet theory with great interest on Mikhalevski's chesspub site 9. Nd2 is also intriguing after Sakaev's two beautifully-controlled victories over Fedorov recently...so many variations, so little time!

agree with Bonsai..  Morozevich must have been hoping for 3. f3 d5, where theory is not so well worked-out.

But Morozevich didn't do too badly either in the Samisch KID. in fact I thought his position was rather playable until he lost the thread later on.

There are two lines where Black opens up the queenside:   
the Panno and the Byrne system (a6/c6/b5). imho the Byrne is underrated, and a stronger system than the Panno. Great choice by Svidler!
 
And, there are two schools of thought on how to treat these lines as White.
 
The Chris Ward school (as you can see in his Controversial Samisch repertoire book) will for instance, play 0-0-0 and go for a mating race. Against the Panno, their choice would be 9. g4, 9, h4 and 9. 0-0-0. Against the Byrne, they will play like Morozevich did against Svidler.
 
The Alexey Dreev school believes in castling kingside whenever Black becomes too frisky on the queenside, thus transposing into a good Classical system where Black has been very "cooperative" by opening up the queenside for White      So, against the Panno, White will play 9. Rc1, 9. Rb1 or 9. a3. And against the Byrne 1. d4  Nf6 2. c4 g6 3. Nc3  Bg7 4. e4 d6 5. f3 a6 6. Be3 c6 7. c5 or 7. Bd3! will both do the trick.
 
The strength of the Samisch lies in its flexibility. While the typical Samisch queenside-castle may be good for White after 6.Be3 e5 7. d5 , it is wiser to be more flexible in the Panno and Byrne. I tend to follow Dreev here and I don't think Black is okay.   

Gallagher is a top KID expert who has spent a not inconsiderable amount of time on the Samisch, so believe him when he says 6... c5! is the best and most critical.

Oh man, am I glad I don't play the KID Saemisch!

The game between Alexander Morozevich and Peter Svidler is precisely why I hate the White side.  Black has no right to go busting up the q-side in the KID, yet in the Saemisch, that's exactly what happens!  Clearly White has better than what Moro played, but what?  Will we see Moro trot out the Saemisch again in this tournament, or is it broken beyond repair for this event?