M B A and M C A both are the highly professional post graduate degree.Both have the bright career opportunity in the Industry.But one should be careful about the reputation of the university/Institute where he has to complete the course.Every body worried about the present economic downtrends but it is a short term condition and this must be revive with in a very short period.So one should not be decided or changes his motive of education based on this.In our country there is a every chance of Industrialization and is always a demand of the professional personnel.

Now if we think about the situation of downtrend then one should go for Managerial skill for better career opportunity.So I must select for the course of mba rather than mca.But in true sense it should be better to do mca and further to gain managerial skill do mba for greater career growth or scope.
There fore in conclusion both the course is suitable for any economic adverse situations.

 Source -  http://www.indiastudychannel.com/forum/26223-MBA-Or-MCA-Which-better.aspx