I read quite a few of the reviews of this replacement head before I bought one, and have left it for a month since I began using it to try and offer a fair assessment.
The foil pattern is different, as shown in the photos above, the question being: do they give a better or worse shave?
For me it's been swings and roundabouts. When I first bought my Series 7 18 months ago I was astonished at how sharp the cutter was, almost wet-shave sharp. A definite 'wow' factor. It even cut a tiny mole I have on my chin, something none of my previous high-end electrics had done.
It performed really well on my average beard though baulked at two-day growth and would tug one the odd hair quite painfully.
The new foil does not have that 'wow' factor. It delivers a very good shave but not the startling one the orginal did. However, it doesn't nip or catch me as the first did, a plus in my view. Additionally, it has coped pretty well over the last couple of weeks when I've been unwell and not shaved for three days. The original would have been more painful to use.
I'm happy enough with the replacement though perhaps Braun could marry the sharpness of the orginal with the ease of use of the new one.