I hear the argument here, but isn't it possible it has dramatically more knowledge and when you get outside the common cases many of us use it for, it'll have completely different capabilities?
I feel like most benchmarks cluster on a reasonably limited area of human knowledge
When I messed with it I used Kagi's search and I didn't have that issue (not claiming they're the best, they're the only one I tried).
They filter their results through their AI, though, so you get a sort of meta-summary of the top few results. It did well with geopolitical news stuff, but I've not tried a hard science sort of query.
I feel like most benchmarks cluster on a reasonably limited area of human knowledge