Well both course are equally good in term of getting a good placement and rest depend on your area of interest .
If you have interest in the management fields then you can apply for the MBA.There are many streams like ::
General Business Specialization
Hospitality & Tourism
In which you can pursue your management course .
To get admission in good college you can take exams like CAT,MAT.Both these exams are done in the national level.
CAT examination is conducted for admission in IIM's and other good colleges and it is conducted by IIM's.MAT examination is conducted 4 times a year by AIMA .
XAT examination is conducted for admission in XLRI college and other top colleges where as SNAP is conducted by the symbiosis institute
But if you are interested in the technical things then you should go for Mtech because it will give you the details information about the things which you are studying.To get admission in good Mtech college you can take GATE exam.
GATE exam is conducted by the IIT's for admission in the IIT's and NIT's and other good colleges which requires GATE score card .
Eligibility for the GATE is that you must have done your 4 year engineering degree or you must have done MSC in any science subjects.
There is no limit to take the exam.
So choice is your both these courses are very good with respect to future scope .