Every college mentioned in your question is widely acceptable and notable in the Delhi-NCR region. The best among all of them is IILM University Gurgaon with a strong alumni base of 12000 members.

You should go with IILM due to the following reasons:

• It offers one of the best MBA degrees in the nation, approved by UGC. The other three colleges however offer only PGDM courses affirmed by AICTE.
• The teaching method is a mixture wherein students apply information and data to their thoughts and ideas.
• The curriculum has the best topics covered at top business colleges all around the world. The modules are inspired by Stanford Graduate School of Business, Wharton Business School, and IIM Ahmedabad.
• Practical exposure is given via live projects, internships, business simulations, and many more.
• You will be assigned a personal mentor at the time of admission. They will act as a trusted advisor and will guide you throughout the program for 2 years.

Placement opportunities at the university are also great. The batch of 2020 received the highest package of 7.5 LPA. You will learn from industry professionals and have great industry exposure.

IILM and NDIM come under the same league. The table given below shows a detailed overview of the institutes:

Some of the factors to keep in mind while choosing a B-School are discussed below.

• Both these colleges are average. If you have a good MAT score of above 95 you can choose a better B-School. Some tier I management institutes accept MAT scores, try to secure a seat at these institutes. You can get admission to good B-Schools through CAT too.

• Simsree Mumbai Govt of MH and  Pumba Pune university are reputed management institutes with affordable fee range and higher ROI. 
• Bimtech Noida is another good alternative with smaller batch size. XIME, Christ Bangalore, Great lakes Chennai are also reputed management institutes.
• Don’t choose a university, based on the 100% placement rate, annual CTC, or ranking. Contact alumni of the institutes on Linkedin to know about the job stability. 
• You have two options, score better in CAT (>80) and choose a reputed B-School that offers placement with a good in-hand salary or if you are choosing a B-School based on MAT score, do your own research and choose the right one. 
• Most colleges reveal the annual package offered in placement, not the in-hand salary. Always check the in-hand salary offered before choosing an institute. Some colleges give the assurance of 100% placement, but the job profiles offered may not be sustainable. Some colleges also offer mass recruitment for placement. So, do your own research well before investing in your management degree.

Do be fooled by the ‘first come, first serve’ policy that some management institute uses for marketing. Tier 1 institutes do not need such marketing strategies. The quality of education of these institutes is enough to build their reputation. So, do some research about the institutes and choose wisely.

A friend of mine pursued his post-graduate diploma in Marketing at JIMS Rohini. The faculties of the institute are great. If you really want to learn from your degree go for JIMS Rohini.

The table given below shows a detailed overview of IILM Lodhi Road and JIMS Rohini.

Faculty - JIMS Rohini (Winning institute-JIMS Rohini)

• Teachers are experienced and well-qualified. They eagerly train students and educate them enthusiastically.
• Human Resource is a subject wherein 90% of professors would teach theoretically and 10% would teach practically.
• My friend had personal relations with the seniors and HR faculty. S.C Kapoor was among his favorites. His way of teaching is completely different from the other teachers at the institute.

For PGDM HR, JIMS Rohini will be the better choice as compared to IILM Lodhi Road.

One of my friends is an alumnus of IILM Institute, Lodhi Road. The PGDM program offered by IILM Lodhi Road is approved by AICTE and has been accredited by NBA.

Curriculum:

• The course curriculum at IILM Lodhi Road is updated and relevant to the industry requirement. 
• It follows the pedagogy of Stanford Graduate School of Business, Wharton Business School, and IIM Ahmedabad. 
• As a part of the curriculum, students need to write a dissertation. Which gives them an edge over the students of other institutes.
• The PGDM course at IILM Lodhi Road has a rich legacy of over 27 years.

Placements:

• Many reputed companies like HDFC, Barclays, RBS, E&Y, Cadbury, Oppo, Protiviti, Khimji Ramdas, Deloitte, Dentsu have come on-board for placement in recent years.
• For the academic year 2018-20, the highest CTC offered was 19 LPA. The average package received by the students was 7.5 LPA.

Extracurricular:

IILM Lodhi Road organizes many cultural events throughout the year such as Annual Sports Day, Alumni Meet, i-Fest (Annual Cultural Events). Students learn through organizing these national-level events. 

Placements, Innovative Pedagogy, Extensive Alumni Network, Infrastructure & Resources are the reasons students should choose IILM Lodhi Road. You can also interact with the current students to know more about the institute.