How predictive is a practice score on an older LSAT (i.e. 127) vs a newer one (i.e. 158)? Is the correlation generally weaker the older the test is?

I've read that older practice exams tend to have easier RC sections, but if you do really well on 127, is there reason to think that will translate to test day? Or should you focus on recent exams to diagnose your likely score?