Scores in PT 1-20 compare to 50+ and 80+ and the real test.

Hello! I been studying for LSAT for a month and a half and I have just finished PT 1-20. My scores are about 170. I’ve heard that PT 50 + are considerably harder, and PT 80+ are even more challenging. I wish to ask how your scores in PT 1-20 compare to those in 50+ and 80+, and compare to your real test score. I’m planning on taking the test in Jan. and want to get an idea of where I’m at. Thank you!