As an equation, Bangladesh is relatively weaker team than India. But you would be wrong to ignore Bangladesh's recent performances. Maybe the Indian team has world class bowlers and batsmen, do you think Bangladesh is far behind India? Bangladesh's bowling unit is capable of competing with India's bowling unit. It would not be wrong to even say that Bangladesh's bowling unit may be stronger than India's bowling unit. But the batting department of Bangladesh is far behind the batting department of India.
I won't say that Bangladesh's bowling department is stronger than India's because India clearly has some proven world-class bowlers, while Bangladesh has some youngsters. You should consider the fact that India will play on its own ground while Bangladesh is a visitor. Even though Bangladesh has some new bowlers like Nahid Rana, who has become the fastest Bangladeshi pacer lately, I still won't say the Bangladeshi bowling unit is stronger than India.
It seems like the pitches will be spin-friendly. Regarding spin track, India has spinners like Jadeja and Aswin, who are far more experienced than the Bangladeshi spin unit. Shakib is an experienced bowler who may help Bangladesh in such a condition.