For those choosing the modular training route, airlines tend to prefer flight training to be undertaken at no more than two schools (three at a push).This means they can be relatively confident that you have been taught to a consistent level.
With reference to groundschool, it doesn't really matter whether you choose distance learning or integrated, as your pass mark will reflect your knoweldge level. I would say however, that distance learning is a much bigger challenge than being taught in a classroom, and I have the utmost respect for those who choose to go down that route.
Jez