To say Jose Mourinho was irked by Manchester United's 2-2 draw with Burnley on Saturday would be putting things mildly."[Spending £300m] is not enough," Mourinho declared. "The price for the big clubs is different than for the other clubs. The big historical clubs are normally punished in the market because of that history."The boys are doing what they can and they are doing fine."Come again? Mourinho raised a few eyebrows when he lamented the spending at Old Trafford and compared it to Manchester City, who could extend their lead at the Premier League summit to a gargantuan 15 points against Newcastle United tonight.The Special One pointed out: “Manchester City buy full-backs for the price of strikers."Obviously, there's nothing incorrect about the statement but the table shows that Pep Guardiola has been more than justified in his approach.But United aren't exactly far behind them having footed heavy fees for the likes of Paul Pogba, Romelu Lukaku and Victor Lindelof since Mourinho joined. It's difficult to see an extra £50 million or so eradicating a 15 point deficit, that's for sure.The comments have certainly caused debate and few fans, pundits or experts have put things quite as interestingly as Simon Stone of the BBC.The journalist penned a three tweet thread in response to Mourinho's comments and actually attributed the disparity in Manchester to much longer term causes.Stone wrote: "Re Jose '£300m' comments. Utd still paying for awful 2013 summer. If SAF stayed would have bought big. Instead got Fellaini. With a blank sheet of paper to build title winning squad last summer, I reckon City had 6/7 (Silva, Aguero, Kompany, KdB, Fernandinho, Yaya, Hart).

"Utd had 3 (DDG, Valencia, Rashford). Since then Utd signed 7 (inc a 35-y-old and Bailly, who is injured) + City 11 (inc 2 keepers and a Mendy, who is injured). Then, Pep has made 3 already there (Sterling, Delph, Otamendi) better. Jose 2 (Lingard, Rojo (until last week)).

"Brutal truth is City currently have far more 'title winning' players. In addition, through a combination of coaching and confidence from positive results, they are getting more out of them. Another £300m may bridge gap but City will spend too so no easy solution."

Could the gap between United and City really be traced back to David Moyes' spending, or lack of, in 2013? Stone certainly makes an interesting case.

Nevertheless, the idea that City have been closing the gap for sometime with Pep Guardiola's arrival and this summer's spending proving the final piece in puzzle, stands strong.

So, actually, yes Jose, £300 million wasn't enough but the Red Devils are more than a few million and players behind their rivals. 

Who do you think Manchester United are so behind City right now? Have your say in the comments section below.