I do not know where the one poster was getting their information... But, I would have to recommend a Norelco triple head shaver over a foil Braun type model any day.
I bought my DH an expensive Braun a couple years ago... And, side by side, head to head, the Norelco triple head beats it hands down.
The Braun type shavers work by vibrating the cutter-blades back and forth just underneath the foil. Because this is the way it works, the braun that I bought my DH is loud and it vibrates your hand off!
The spinning Norelco blades do not vibrate.... They are whisper quiet!!!
Also, for anyone with any curly type hair in their beard, it is hard for the foils to pick them up and shave them. But, with the rotary Norelco heads, with those grooves, they will pick up any hair, even if it is curling back in to the skin.
I even saw all of the above points on a GMA segment, comparing different types of razors.
Too bad I didn't see that before I wasted the money on that Braun. My DH immediately went out and bought a new Norelco to replace his old one.