Hey.
As per the NEET 2018 Exam Analysis, the exam was easier as compared to the NEET 2017 exam. Acccording to this:

NEET 2018 Expected Cut off Score for General Category (50 Percentile) – 130 +/-5 marks
NEET 2018 Expected Cut off Score for OBC / SC/ ST (40th Percentile) – 110 marks
All India Quota Cut off for NEET 2018 Ranking as per experts would be about 510 - 540 marks.

This refers to the marks students would have to score to get admission in the government colleges under 15% All India Quota/ State Quota for good government colleges.
Hope this helps. All the best.