That’s a really good question, and the answer is that it’s highly complicated. :) Why don’t you get into speaker building where you can learn all of this and build a nice pair for yourself??
<< he said with an evil twinkle in his eye >>
By themselves crossover points and slopes tell us little, and some may be arguable. For instance, steep slopes may improve off-axis listening but time co-incident speakers (like Vandersteen or Thiel) may deliberately use very shallow slopes.
As a buyer, you should be much more interested in the impedance curve as that's a good indicator of how easy a speaker will be to match with a variety of amplifiers.
I wrote a little bit about crossovers here. It’s not a direct answer to your question but perhaps it will help get you started:
https://speakermakersjourney.blogspot.com/2016/12/crossover-basics-driver-response.html