It’s hard to quantify as Shaktar are the Man City of what is very poor Ukrainian League.
SD are a very well run club that consistently buy and sell well - and have done over the course of a decade, so I assume they have an established scouting system/DoF. His predecessor, Lucescu, was there was 12 years and so Fonseca inherited an established and successful team.
Here it’d be a rebuilding job where he’d have to implement a philosophy from scratch with a squad that needs a fair bit of work, in a league where a manager is expected to deliver instant results.
It also comes back to Walsh and our own transfer ‘policy’; would Fonseca get the players he needs to implement his tactics?