Look at the money they had to spend for the likes of Mangala and Bakayoko and the clubs they were linked with at the time and you will see the difference. Mangala was seen as one of the better CB prospects in world football for example, and Bakayoko was a key performer in a Monaco side that pipped PSG to the league title and made a strong run in the CL. This is aside from the fact those teams spent way more than those sums on other top-level players.
The amounts paid for the players we were talking about previously:
Davies - £10m
Trippier - £4.5m
Dier - £4m
Alli - £5m
Spurs must have had legendary levels of scouting/negotiators in place to sign all these guys you clearly perceive as ready-made, top class players, completely under the radar for next to nothing. Clearly they were all just waiting to be snatched up by any top 4 club and would have instantly improved those sides, as evidently Pochettino had nothing to do with their progression. Spurs just magically managed to find all these hugely undervalued players before any of the other sides it seems.
Bakayoko and Mangala were subpar players and anyone that actually watched them knew it which makes City and Chelsea signing them hilarious. Bakayoko played well for Monaco from August to late november 16/17, before that he was considered a massive flop and after that he was subpar again.
And again the only thing that matter is the actually quality of the players, you either address that or there is not point pursuing that conversation.