which edition of poulenc 4-hands sonata?

[le_poete_mourant]

I wanted to get a copy of the Poulenc Sonata for Piano, 4 hands.  But there's two different editions on sheetmusicplus.com, and I'm not sure which to go for. 

https://www.sheetmusicplus.com/store/smp_detail.html?cart=337863970524284644&item=4286346

https://www.sheetmusicplus.com/store/smp_detail.html?cart=337863970524284644&type=rec&item=790968

Now, the second one is much more expensive than the first.  I wonder why this is.  Is the second a better version, or a more accurate version?  Is the first "dumbed down," that is, simplified.  (It does say "revised version")

But I don't want to spend $12 extra if they're the same. 

Anyone know ?

[gymnopedist]

The revision was done by the composer, so i wouldn't worry too much about it... I have the expensive version, and it's fine. However, f you look at the cheap one, it says "reprinted from chester" (The firm who published the expensive one), which probably means that they're the same.