The main purpose of pursuing an MBA is to elevate your current profile and render you better career opportunities. Doing an MBA just for your resume or because everyone is doing it is not justifiable. And honestly, neither of the two colleges you mentioned has the potential to enhance your employability skills. So I would right away say that both these are not good options. 

The reason why IIM Sambalpur is not worth it is mainly because being a new IIM, its tag has little or no brand value. Its overall worth is also very less in comparison to other IIMs. Most importantly, if you were able to get into a new IIM, chances are you can even get into an older, better one with a tad bit more effort and determination. So you can try again next year and join a better one.

The reason why XIMB is not worth it is because of ROI. The high fees compared to mediocre packages that are offered make no sense. You can get similar packages at a tier 2 college with much fewer fees.

Still, if you are under pressure to choose one, definitely go for IIM Sambalpur. The IIM tag might come in handy someday in our country whose corporates still value the tag more than the potential.