You probably won't like my interpretation of it but here goes.
High end is a bit of bling added to a crap kit so the man can charge more dosh.
Manufacturers label kits as high end for that reason alone.
High quality is something I have yet to see in any kit and probably never will due to the fact the high end ones are beyond my budget and to me not worth the price.
Quality is a personal judgment some are happy with a crap kits, whilst inroads are being made to improve the quality of kits for my money there is still a long way to go.
This is to take nothing away from your efforts, I and many others appreciate the work you are doing for us and any improvement is a bonus for us init?