Got sent this which I think answers all the questions mate -
So, If they want to compare city and united treble winning seasons, here's the comprehensive rundown - Pretty much every comparable stat, city smash united hands down.
League points
City 89 - United 79
Winning Margin
City 5 points - United 1 point
League Wins
City 28 - United 22
League Draws
City 5 - United 13
League Losses
City 5 - United 3
League Goals Scored
City 93 - United 80
League goals conceded
City 33 - United 37
Longest league winning streak
City 12 - United 5
Longest league run without a win
City 2 - United 4
Biggest league win
City 6-0 - United 8-1 (both against Nottingham Forest)
Biggest league defeat
City 0-1 or 1-2 (all 5 defeats by 1 goal) - United 0-3 Arsenal
Lowest League Position
City 4th (Matchday 1) – United 11th (Matchday 2)
Top League Goal scorer
City 36 Haaland - United 18 Yorke
FA CUP
Goals Scored
City 19 - United 12
Goals Conceded
City 1 - United 3
Teams defeated - City (Chelsea, Arsenal, Bristol C, Burnley, Sheffield United, Man United) - United (Middlesbrough, Liverpool, Fulham, Chelsea (replay), Arsenal (replay) Newcastle)
LEAGUE CUP EXIT
City QF Southampton 0-2 - United QF Spurs 1-3
CHAMPIONS LEAGUE QUALIFYING ROUND
City N/A (didn’t need to qualify) - United 2nd Qualifying round LKS Lodz 2-0 agg
CHAMPIONS LEAGUE GROUP STAGE
City (Dortmund, Sevilla, Copenhagen) - United (Bayern, Barcelona, Brondby)
Groups Stage stats
City W4 D2 L0 finished 1st - United W2 D4 L0 finished 2nd
Group stage goals Scored
City 14 - United 20
Group stage goals conceded
City 2 - United 11
Group stage points
City 14 - United 10
CHAMPIONS LEAGUE KNOCKOUT
R16
City vs Leipzig - 8-1 Agg - United N/A (R16 didn't exist)
QF
City vs Bayern 4-1 agg - United vs Inter Milan 3-1agg
SF
City vs Real Madrid 5-1 agg - United vs Juventus 4-3 agg
Final
City vs Inter 1-0 - United vs Bayern Munich 2-1
Champions League totals
Goals Scored
City 32 - United 29 goals (+2 in qualifying)
Goals Conceded
City 5 - United 16 (+0 in qualifying)
Read into these stats what you will, but its fair to say City's treble is far superior in nearly every way compared to United’s.