Tarek, I think he meant hardcore racing versions of these cars in DR's group test. For example, the GT2 RS and the 'Scuderia' version of the 599 - the latter being compensated for by the recently released 599 HGTE.
As for the SL63 BS comment, I would have to agree with dr Dunkel. As good and insane the SL65 BS is, (and it is good and insane

), I can't help but think that in light of the praise heaped on AMG for the CLK BS, that the real SL BS should have always been a mental version of the SL63, and not the SL65.
Instead, what we have in the SL65 BS is a mental and slightly more hardcore version of the standard SL65, which to be honest, is truly outclassed in terms of agility and driver appeal by the SL63. Now, 10 out of 10 to AMG for the commitment and changes they brought in to make the 65 BS, but I do think their job could have been a helluva lot easier had they stuck to modifying the SL63 to be the base car of the SL BS.
Can you imagine a 571hp hardtop, lightweight car, with the MCT, an active spoiler and wider rubber? Priced at around £130-150K. In fact, as I type this, I can't help but think the SL65 BS was a deliberate move by AMG, because the very car I just mentioned in this paragraph is not too far away from release is it?
Very clever AMG, very clever.