They are all sharp. You need to decide if you want to spend extra money on other aspects such as rendition, bokeh, colour etc.
You are refreshingly correct. The obsession with "sharpest" is sadly almost a disease and its very mindset deviates one from pursuing photography. Sharpest, lightest, smallest, etc., etc., etc. I wish, I really do, that our younger generation and not so young pursue the art of photography rather than checklist specifications. I worked as photographer for 5 decades and seriously, I don't recall any of my colleagues ever really discuss lens or camera specs, never. We discussed subject, composition, light & film. I'm not trying to lecture anyone but it really pains me to see how much money is spent by amateurs nowadays without any meaningful results. Most amateurs own far for gear than pros. Spend less time analyzing and more time practicing photography. Try it, you will like it.
Gator
While I agree that you are quite correct, I suspect that the reason for your observation is that this website is somewhat a subset of photographic interests. DPReview is a
gear website rather than a
photography website.
While there are occasionally some interesting photographs posted in this forum, that is not really the main area of interest. The subjects of "subject, composition, light & film" are more clearly addressed elsewhere and with a different audience.
Not that I'm criticizing anyone for having an interest in the equipment, I'm pretty much of a gear person myself. I thoroughly enjoy mucking about with fine equipment and sometimes tend more to that than making photographs.
Incidentally, much to my dismay I can no longer pretend to be part of the "younger generation".