Hello Applicant,

Both coaching institutes have their own perks and I am going to elaborate on them.

ALLEN:- 

• You will feel that you are in a gurukul.
• You have a dress, teachers have a dress and overall system is disciplined.
• You will study in an institute which has a record enrollment of the student.
• You will study from your country's best teachers.
• Your study material will be relatively tough.
• ASWS:- a society from to students who give every support other than study.
• Pretty good management. Takes care of its student.
• Well planned lectures.

Resonance:-

• Programme and some of my hostel mates study there.
• Study material is quite realistic. Means hardness level and question level is equal to that of mains and advance.
• Good infrastructure: you will feel like you are in a mall or a MNC.
• No dress code.
• You cannot leave coaching in the middle of your class time without a reasonable application.
• I think weak management.
• No support to students other than study.
• Overall both two have their own perks you can choose between them. But since I have studied in Allen I think Allen is dominating resonance.

Good luck!