A very entertaining rally. Fantastic gets, a few shots from behind the back, you can't ask for more.
Crazy rallies like this, we generally get them from Ramy Ashour vs. Nick Matthew or vs. James Willstrop.
These rallies are always a combination of higher and lower quality shots - but the one who hits a low quality shot is capable to recover with the next shot and then turn the momentum, and so on.
But the difference between the two players in the below rally - Alister Walker, current world #12 and Chris Simpson #37 - consists I think in the movement. The court seems just a fraction bigger for these two guys compared to the very top players.
It seems to me that the top guys move in a more ergonomic way; they come out of the lounge like a "wave", their movement is not sectioned into "lounge, brake, stop, back", it's rather a constant flux. Don't get me wrong, Walker and Simpson are two great athletes, both heavy trainers, both quick and strong, but they do not posses that fluidity that you can observe with Ramy, Greg, James or even Peter Barker.
I don't know if this is purely a technical question? Probably it is also linked with the speed of perception (how quick one reads his opponents intentions). When you are less in a rush, you can allow more harmony to your movement. And probably more harmony even to the execution of your shots, or even to your shot-selection. We are talking about nuances, but these nuances make the difference between the top8 and the top20 and so on.