Dear aspirant,

For Bachelor's of commerce, both the colleges are doing great and you can join in either of the Colleges. The faculty are a bit good in Rajiv Gandhi and also mostly the same in Allahabad University too. My personal advice is to visit the college and then decide accordingly. It also depends on where you reside and how much you can afford.

Please go through these links below for more information,

https://www.careers360.com/colleges/rajiv-gandhi-college-of-arts-commerce-and-science-navi-mumbai/bcom-course

https://university.careers360.com/articles/allahabad-university-cut-off/amp

https://www.careers360.com/university/university-of-allahabad-allahabad

Hope you find my answer helpful !!