I was just thinking this morning, that I should write up a review of the ATX. I've had one for several months now. Also have the sport.
The ATX is cute. I have the 4x blades. It just does not stand up to the Sport. I'll get a few shaves with it. Then it seems that the blades are dull and it feels like scraping my head. Don't like it. I do like that it gets closer to the ears, but that's about the only advantage of the ATX over the Sport.
The 3x blades on the Sport seem to last and last and still seem sharp.
I suspect that it would be almost impossible to cut my dome with the ATX, but I rarely have issues with the Sport, and when I do, it is clearly my fault.
I hope that the Head Blade people are reading these posts. Yea! Sport. So, so to the ATX.
At least I can still get sport blades online. The 4x blades were HORRIBLE in the sport. Forget that.
Sorry, just can't get used to the ATX and don't get a close shave with it.