According to me, this question crossed your mind because you got an admission into HBTU Kanpur, and want acceptance from the students of MNNIT Allahabad.
If this is true, I would suggest you go ahead with HBTU Kanpur. It is at par with MNNIT in terms of academics. The placement scenario is brighter at MNNIT, but the packages are almost the same for both the colleges. In terms of exposure, surely MNNIT Allahabad is way ahead. Try to work hard and grab a good placement package from HBTU.
You are at a very crucial stage of your life, make sure to spend your time enhancing your skills, and stop worrying about the college tag.