Having a argument with a blue at work who thinks Pickford is the dogs bollocks. And better than Allison. And the only reason Allison has conceded less is because he's behind a better defence.
Could some kind person help me out and put some stats on here comparing not just Pickford and Allison, but how Pickford compares to the rest of the keepers in the league as well.
Here's my attempt at analysing Goalkeepers, it's a work in progress and something that admittedly I left to gather dust but I updated the data this afternoon so it covers all games up till yesterday. Not sure it helps prove your point definitively , I guess it depends on how you interpret it.
It might also be worth trying to explain the concept here although, admittedly there's still a few things to iron out:
Basically I gather all shots on goal and strip away anything that isn't on target, I also strip away Penalties as these are high xG events that should be analysed independently. I am then left with Shots Saved & Goals. These are therefore situations that are entirely in the gk's remit and because we are using xG it helps quantify difficulty of shots (a lot better than simply analysing shots on target but still with its own pitfalls).
I then subtract one from the other to give me a net balance. If it's positive then it suggests that a goalkeeper is saving more than he is letting in based on the balance of probabilities.
Taken in context and looking at the overall Total in isolation to the right. The numbers suggest that Pickford is doing badly, however I'm also able to break this down by situation, and we can see that in open play Pickford just edges Allison (the difference is just 0.05) , however that could easily change in the course of the next game. So overall the stats doesn't seem to suggest that there is much of a difference between them in open play situations.
However it clearly shows how Pickford is let down in corners and whether that's down to Everton's defence or his small arms is hard to tell.
What's interesting to note is how Allison is the only gk with no negative net balance in any situation. It also looks like he has had no set pieces on the data but if I drill down to a match aggregation level it clearly shows how it's simply a case of the net balance equalling 0.