As an alumnus of UCMS, I will shed some light on my college.
UCMS is one of the top 10 medical colleges in India. It falls under Delhi University. The academics are good, and the college fee is affordable. The campus is good too. Various college events are organized on a regular basis.
The seniors and faculty are very helpful. It is one of the major hospitals of East Delhi, so it has a lot of OPDs. The metro station is close by, so good connectivity is offered to other parts like Chandni Chowk, Rajiv Chowk, etc.
PGIMS Rohtak is the best medical college in Haryana. It has a very big campus and a lot of OPDs.
UCMS is a better choice. But if you wish to complete your degree from Haryana, you can choose PGIMS Rohtak.