Both the IIMs, IIM Rohtak and IIM Raipur give an edge to each other in the sense that they have similar faculty, teaching methodology, rankings, placements, and brand value.
However, IIM Rohtak has a locational advantage being situated in the NCR region. This attracts more corporates and companies for placements. It also has a bigger batch size than IIM Rohtak and a strong alumni base.
Ultimately it’s you who decides the B School that is most suitable for you. Both these IIMs are almost similar but I have to say IIM Rohtak gives a slight edge to IIM Raipur.