It's Multan 24 in my opinion and i have very good reasons that made me choose Multan 24 over Pindi' 22 :
1 - England lost the toss in Multan but in Rawlpindi they batted first , it's much harder to dictate the match when you field first in the heat, especially when opposition has you in the field for 150 overs.
2.England had a much better/experienced bowling attack in Rawalpindi compared to Multan ..
In Rawalpindi England had Anderson, Robinson and Stokes , Leach played both tests and Will Jacks despite being the worst bowler reputation wise took 6 wickets in the match..
In Multan England had to deal with a host of injuries which lead to an attack that many claimed was the weakest attack they have seen in a while, many England fans made fun of Carse before the match , Woakes away record has been well published, Atkinson on his first away tour and Bashir a novice spinner , also Pakistan's Multan bowling attack on reputation is a bit better than Zahid Mahmood , Mohammad Ali , Haris Rauf who played in Rawalpindi 22'.
3.A World Record in Multan
First time in Test history, a side lost a test match by an innings despite scoring 500+
That's something significant for Bazball
4.A Triple hundred scored
A lot of people didnt think it would be possible for someone like Brook to score a triple hundred playing the Bazball way but he did , a lot criticism has been made on the team for throwing away big scores but he made it count.