MBA would be a better choice if you are interested in finance, marketing, human resource, operation or it . These are the specializations available for Mba .
You can pursue MCOM if you want to pursue other professional courses like Ca , CMA OR CS , then you should do MCOM , otherwise they're many more specializations available in MBA .

But the curriculum are similar for Mba and MCOM.
The key differences are as follows:
MBA is a demanding degree in a corporate sector.
After MBA your career path will be open for any corporate sector
Mcom is available in finance , accounting and banking sector only.
MCOM is a demanding degree in finance sector only.

MBA is considered as a general degree which empowers understudies to find out the parcel of zones whereas MCOM is a much more narrowed degree that allows students to specialize in majors such as finance, international business, accounting etc :
Now it depends upon you what you want to study .  Also MBA is more costly than Mcom.