Dybala hasn't wanted to come to Inter before. However what is Juve today and what is Inter today? It think we've already closed the gap and basically thrown the out of the throne if Italy. Scudetto this season and that's sealed.
Dybala might view Juve and Inter differently now, specially if some promises were broken between him and the club. But financially he would need to take a paycut or keep the same salary (7.5m) so I don't know will he accept that. And like
@.h. pointed out, Dybala wouldn't have tax reduction so he would be extremely expensive for the club. I mean there's no way we're signing anyone with 10m€ net salary from Italy, I think something like 7.5m is the limit (from Italy) and even then it's a reach and would limit the rest of our mercato.
Vlahovic IMO is not in the same category transfer-wise since he would command, if not the same salary but maybe 6m€ and then on top of that, some 70m€ transfer fee.