I don't think so honestly. Signing one of the best right wing backs around beating the likes of City and Bayern to the race is for me way more impressive than signing Arthur just because it's FFP era.
Arthur is a starting player for Barcelona. It may not be the Barcelona of 2004 to 2015, but it's still a top 5 team in the world. Dortmund on the other hand is on a similar status to Inter and Real Madrid didn't feel the need to keep him over Carvajal who isn't anything great, just a solid 7/10 option.
We did a good deal here but I feel people are overrating Hakimi just because of 120 minutes against Inter they saw him in, which was mostly due to Inter's tactical blunder in that 2nd half that any greatness provided by Dortmund.
Not so sure if Bayern or City were very serious about him, I think only Man Utd was really serious even though they have this Obi Wan Moussaka guy that they rate so highly and PSG was also going to make a move in July, but too late for them. Either way, he's a kid with potential, not a legit top player. Arthur on the other hand has been a very important player for Barcelona. Dortmund and Barcelona are not on the same level. This is sort of the equivalent of Real Madrid signing Lautaro for example and saying that they beat Barcelona and other great clubs to him, but then Barcelona goes to buy Mane or De Bruyne. Who would you call the 'colpo di mercato' here? Of course both would be, but #1 would be the guy proven at a greater stage, playing for a club that has had better success.
No need to play down Juventus' capture of Arthur, it's an amazing buy for them. Just like Hakimi is a great buy for us.
If you want to overhype some Inter transfers, those should be Eriksen, De Vrij and Lautaro imo. Hakimi on the other hand is more of a statement than a 'big transfer'. Signing a player from Real Madrid that was highly rated for a couple of seasons, having good seasons with Dortmund (which should be treated as the equivalent of Atalanta & Porto when it comes to signing players from them) and at a very good age. But let's not start expecting from this guy to our Dani Alves, otherwise people will think he's Alvaro Pereira.