Hey atul...
Well both IE and ESCP are extremely good schools and enjoy quite a reputation in the EU so one cant really go wrong choosing one over the other here. But since you seem to be in a great dilemma over certain aspects of both the programmes, i will try to briefly communicate to you the pros and cons of both IE and ESCP MIM.
FIrst of all, it is an MIM degree you are going for, so focus more on the MIm rankings than the overall ones, because for certain EU schools like ESCP, WHU, their flagship programme is MIM and not MBA, so though the overall reputation matters , the top 10 MIM programmes enjoy good repute.
Since you want to return to the job market as quickly as possible, IEs shorter program may be good for you. But having no internships can be both good and bad mind you, since in EU a lot of the jobs are "internship-converted-to-fulltime". So think it through. IE as a school is excellent, but with the economic situation and smaller country size the process of getting a job would be more difficult there, so more or less ESCP might just be a slightly better bet for the time being.
Again, there is no one size fit all answer here really, if you like the IE experience, Spain, The teaching methodology, the entrepreneurship environment, then IE can be good, but if not, then just because its a longer program, doesn't make ESCP MIM any less exciting or fruitful as compared to IE MiM.
ROI of bOth schools are more or less same since the extra overheads of living in ESCP for two three years are somewhat compensated by the internships, scholarships, etc etc. So overall, its a really personal decision to make. As i said, you cant really go wrong here, just focus on the aspects of you care about such as salary, roi, course experience etc. And i am sure you can conclude in no time.
Hope the answer helped. Also if you want to know more about both schools, visit
https://www.mim-essay.com/ie-mim-review/ and
https://www.mim-essay.com/escp-mim-review/ All the best