Ranking services are probably getting better for women's basketball since the money involved in the game has gotten better. But there are still thousands of teams across a vast country, some who travel and others who don't, and there are some built in biases based on geography for most of the services. And that is before we deal with international players. So ... there are cracks in each ranking services where players can get missed. If you are looking at players on the top 50 HS teams, who also play on one of the top 'AAU' teams, then they are seen often and in competitive games and the rankings are likely pretty close between services.
And however good or bad a ranking service, the projection to the college ranks is problematic, because the college landscape is not homogeneous. Horses for courses as they say - great talent, wrong school, disappointing result, moderate talent, right school, surprising result.
How good are the final big boards in the NFL draft, and how well do they hold up four years later? That industry invests 100s of millions in the evaluation process of a much more limited field of college players and hits at maybe 30% of the top 32. And how much is that hit rate is a result of the right fit of player to team vs the inherent talent?