Interesting me and my bro been wondering exact same thing but for the USA b3 version and then Simmons bilt realmcoy, toy McCoy n buzz rickson go and rear their headI'm struggling trying to decide who to go with .
I am looking to get a flying jacket and to decide between,
either the pre war models
https://www.eastmanleather.com/raf-1940-pattern-battle-of-britain-p-157.html
or
http://www.aeroleatherclothing.com/product-detail.php?id=106
or between the later B.O.B models
http://www.aeroleatherclothing.com/product-detail.php?id=105
or
https://www.eastmanleather.com/raf-1942-pattern-p-158.html
From the online images they look very similar though the Eastmean Leather looks like. a more 'suede-ish' finish and less shiny (which I imagine would break in more easily ( shape to my body) but to be less wet weather tolerant in the long run.
I think I read that the EM ones now have hand warmer pockets ( I could be wrong) where the Aero don't and won't ( I have asked.) Pockets isn't a deal breaker but I did find them useful on my Currus flying jacket (sadly dead)
why are the EM ones the best part of £100, more expensive?
all thoughts much appreciated
thanks