Rogers, who signed for Villa from Middlesbrough, was previously at Manchester City.
On comparing Emery to Guardiola, Rogers stated, per the Birmingham Mail: "I would say how keen they are tactically and how they want their teams to play. How they are structured, how the positioning is so vital.
They kind of see it as the most important thing. It's like a washing machine. They just do the same thing all the time.
"Be consistent, be consistent - it's repeat, repeat and repeat. It's relentless, that's why they are the best managers in the world in my opinion because they are so relentless, they are so onto you but when it comes off you see the performances and results that they pull off, it's no coincidence because all week their tactical awareness and understanding is on another level to anything else I've ever seen."
Rogers added: "He (Guardiola) likes large numbers in his groups so I was around them quite a bit when I was there. Everyone was. You all get a taste for it and if you perform, then you stay there. It's as simple as that. He rewards good trainers and good performances in training.
"They are big on young development. Even if they are working on a specific area with a young player they will get help from the first-team. That's massive for young players. When I was in that position, Pep used to do that stuff with me and you don't forget it. It just sticks in your brain and that's what he did."