The experience of Xavi Hernandez is also not anything close to someone like Guardiola. And even in this short time, he has actually been able to win the La Liga title under some extreme conditions. I understand that Barcelona did provide him with some decent amount of money to be honest. But if Barcelona wants more, they will have to spend more. And that is something Barcelona cannot do right now.
Xavi has been with Guardiola. If you look at the games, they have the same philosophy. You have to remember Guardiola takes a long time. He is also building a team, with his long period as coach unfairly comparing Xavi and Guardiola. I think Xavi is quite a genius, he has the potential to have achievements like Pep Guardiola. He still has quite a long time to be a coach at the current age. Regarding players, maybe they have limited funds due to economic circumstances. Even yesterday I heard that they still have some players who have not made the official list in this season's competition.
Comparing the two sides of this coach is very far and I think it's true if it's unfair because the two coaches have similarities in terms of training and strategies that will be used for their players like a few games ago against Cadiz Barca players had difficulty scoring in the first half and after it was the second half Gonzalez and Torres were able to score because Xavi was the same as Guardiola when in the first half studying the opponent's game after that he had a new strategy implemented in the second half which was always successful.
So for me these two trainers have something in common that doesn't need to be compared.