Actually Pereira comparisons to Ramos are quite a good one - both were managers who were successful based on work in very well run clubs (Porto currently and Sevilla during Ramos years, when Sports Director Monchi was making some amazing transfers). Ramos didn't repeat his success elsewhere and there's a risk that Pereira good work at Porto is also happening mostly because it's a club which is extremely well run and just find a right coaches for their very specific needs. Needs, which not necessary have to be similar for ours.