Jo.
I've had this discussion on another forum and the consensus was that the first 2 or 3 centimetres of a tool is of a different quality.
But everyone I've read about said it was the first bit that was the worst, once they ground past that the quality of the tool was better. It was assumed to be something to do with the hardening process being less controlled at the tip.
Certainly one of my Henry Taylor bowl gouges sheared the tip off one day while cutting an Oak bowl, but it seemed much better once I'd reground it.
Could it be you prefer the 'temper' of the tip steel to the rest of the tool?