For MBBS through NEET, under 85%state quota in genCat which state has advantage: Punjab/Delhi/up/haryana in term of seats vs students

State Quota Cut off marks can be an approach to answer your question. Because cut off marks directly depend on number of students (from thar state) appeared for NEET and number of seats available. So the state with least cut off can be considered advantageous.

Let us look at 2017 State Quota Cut offs (for general/unreserved category) for the above mentioned states -

1. Punjab
NEET Marks - 544
NEET Rank- 12,370
College Alloted - Guru Govind Singh Medical College, Faridkot

2. Delhi
NEET Marks - 555
NEET Rank- 9,871
College Alloted - UCMS

3. Uttar Pradesh
NEET Marks - 550
NEET Rank- 10,975
College Alloted - Government Allopathic Medical College

4. Haryana
NEET Marks - 556
NEET Rank- 9,612
College Alloted - Shaheed Hasan Khan Mewati Government Medical College, Nalhar

The cut offs for the above mentioned states are very close to each other. Anyways, it seems Punjab is at an advantage as cut off mark is comparatively lower.