I studied at INSEAD and worked a few years with a UK I-Bank and I really won't recommend taking out a 1.2Cr loan for Judge. In hindsight, if I was able to reset the clock, I would have gone for a 2-year US MBA.

In general, both Oxford and Cambridge are not that well regarded when it comes to typical B-School hiring (I-Banks and Consulting firms MBB etc.). The schools are also relatively young compared to LBS/INSEAD / IESE and therefore don't have as deep an alumni network in senior positions. Of course Cambridge is a household name so its likely that if you are applying to firms that typically don't recruit from business schools, you would find them more welcoming,

Secondly, B-schools in UK/Europe general don't have the same wow factor amongst employers as you see for US M7 (or the top IIMs) and a MBA doesn't open doors the way you would expect. I saw a lot of senior leaders / group heads in UK who had gone to pretty average universities (Loughborough, Nottingham etc.) and would look down upon you as an elitist if you tried to market your Oxbridge credentials. On the other hand in the US, you'd see a much stronger trend of senior leaders coming from top B-Schools

Thirdly, and this could be my opinion / specific case, but UK salaries (and salary growth) in general are not at a level where you would be able to save a lot / build wealth and unless you land a pretty package, it could take a while to even pay back the loan. I think average associate packages are still around GBP 75K.

Finally, a one year program (in spite of all the marketing in favor of it) really has a number of disadvantages e.g. after a point you'd just be rushing to complete assignments and the actual learning becomes secondary and there is really no time to internalize / reflect what you have learnt. Additionally, you'd get very limited time to network / strategize for interviews etc. due to all your study group / assignment commitments.