The 26-year old Argentine left Real Madrid with the reputation as one of the greatest attacking players in the world, having dazzled for the Spanish giants since 2010, when he arrived in Spain from Benfica.
Despite struggling to make an impact in his first United start against Burnley, he burst to life against QPR, winning the man of the match award having opened the scoring.
However, his arrival to United means that he will unable to appear in the Champions League this season, a competition that Lucas excelled in on Wednesday night.
With PSG looking to seriously challenge for the European crown, a 1-1 opening day draw with Ajax was not the scoreline hoped for - although the 22-year old Brazilian claimed the man of the match award with a mesmerising performance.
With both the current United star, and their former target, impressing, comparing their most recent games - both man of the match performances - would allow a fair review of whether the Red Devils signed the correct forward.
For the sake of consistency, both playmakers played roughly 80 minutes, with Di Maria featuring for one more than his Brazilian counterpart.
And it was the Argentine who had the largest match-winning impact, scoring one and registering an assist, whilst Lucas failed to do either.
However, Lucas completed more offensive actions during the game, just without a reward. Both forwards played four key passes, but Lucas completed three successful dribbles to Di Maria’s two, as well as having four shots to Di Maria’s two.
The Brazilians pass accuracy of 89% also dwarfed Di Maria’s 80%, as he linked up play with his teammates to a higher ability.
The final statistic worth taking into consideration is the amount of touches both players had of the ball - with Di Maria registering 95, whilst Lucas only had 61.
Whilst it is promising that United’s star was willing to involve himself more heavily in the play, his inability to complete as many offensive actions as Lucas, despite having over 30 more touches of the ball, shows a profligacy that the Brazilian avoids.
Both forwards are clearly at the top of their game, but the former United target is certainly more effective as an attacking outlet. Di Maria is certain to wow Premier League audiences with displays of utmost quality, but it may just be concluded that Lucas would have been the better target to sign.