Hello

Firstly Allen Kota is has more flexible fee structure than aakash delhi.

Second there is difference of study material Allen provides more study related things like tests etc

Aakash has more fees structure as compared to Allen

Allen has the best faculty there is a different faculty members for every subject .

Aakash where as has one teacher for many subjects like organic and inorganic chemistry are taught by same teacher

Aakash study centre try to mug up as fast as possible whereas Allen focuses in every aspect.

Though any institute may be good in various other things it up to you how you like to study .

Do you want to study slowly or learn at a fast pace.

All the best!

Whichever you choose just choose according to your liking .