Pads, or any other form of applying paint to walls that isn’t a roller and a paint tray is just a gimmick.
The pros use rollers. You should use a roller because it’s what the pros use.
Worked for an architect doing the showroom build for Vitra, and we used pads, as well as rollers.
Personally with rollers if the paint is quick drying, going over it it can pick up the dried surface of the finish and deposit it back on, meaning it needs removed and start again. Pads have been in use since the 80’s Rollers are a very quick way to apply finish over a large area leaving a reasonably smooth finish.
Pads are good for edging, especially close in to right angles of walls, where the edge of the roller catches the opposing wall.
My thruppence ha’penny worth, if it helps 🙂