Verratti went to PSG not only because they offered more, but there werent any urgency for Juve to sign him, we had the MVP brilliant midfield plus Marchisio. Juve would prolly loaned back Verratti and who knows what they told him about when he could play for the team. While PSG offered immediate playing time.
With how our midfield need is now, its absolutely opposite of what it was back then, and Tonali, tho not guranteed starter, both has a need and space to play immediately for our midfield if he plays well enough.
So the sitautions couldnt be any different.
Also we are in the position financially to match whatever PSG could offer him now, which wasnt the case back then, we are quite limited in our financial power and had to prioritize at every turn.