MNNIT Allahabad is better.
MNNIT Allahabad will be especially good if you are thinking of joining the CSE branch.
The better institute among NIT Calicut or NMIT Allahabad depends on what branch you will choose. For Engineering, NIT Calicut is ranked 23rd and MNNIT is ranked 48th by NIRF 2020. Given below is a brief discussion about the two colleges.
Admission Process and Course Fee
NIT Calicut and MNNIT Allahabad both take admission based onJEE Mainrank followed byJoSAAcounselling. The first year course fee at NIT Calicut and MNNIT Allahabad is respectively INR 53,797 and INR 84,666.
Placements
This is a general overview of the two NITs. Both the NITs are good and offer decent academics and placements. You should compare the two colleges based on the branch you are interested in and choose the college with the better program for that branch.