Bolt vs Bekele at 600m would be intriguing. I'd give the edge to Bolt but not by much.
I estimate Bolt could run a 45 flat at minimum, at the moment... He could probably comfortably cruise through 400m in 50 and hold on for a 1:16 or so...
Bekele on the otherhand is likely maxed out around 48 mid- 49 flat. He may be able to cruise through in 51 and hit a 1:17...
Bolt 1:16 over a fast charging Bekele 1:17... Thoughts?