In marketing both of the colleges.

According to all points that you want to know about the colleges, by comparing those things between the colleges, Amity University is best.

Now your fees in details.

Fees :
Amity University : 11.52 lakhs
ISME Bangalore : 6.45 lakhs
There has also scholarship schemes, which you can get from the official website.
Placements :

Amity University : Amity University is known for MBA as well as the B. TECH programs & it's best placement records over few years. Last year it's highest placement was 15.5 lakhs per annum in Amazon. Also over few years it's highest package is also like that. Companies like Amazon, Delicate & American Express do visit every year. Also 80% students get placed in companies like Aretata Housing (5lakhs), Leighton Contractors (5.5 lakhs), Al naboda (13lakhs), Mahindra(7lkahs), Godrej (8.5lakhs). Also their has opportunity for off campus placements. Compines also offers internships with good stipend.
So, overall the placements are good & average placements goes upto 7-8 lakhs. Also many top MNC'S visits the campus.
Now, it's all upon you how you perform their & do internships.

ISME BANGALORE :

Highest packages goes upto 6lakhs. Notable Alumnies at the companies-AC Nielson, American Express, Amazon, Asian Paints, Aditya Birla group, Capillary Technologies, Deloitte, HCL, IBM, Kotak Mahindra etc. So, most of comapines visits the college & also top MNCS. The average package goes upto 4-4.5 lakhs per annum & it's improving.

Faculty :

Comparing the faculty of these colleges AMITY University has great faculty members according to thier knowledge & experience.

ROI:

ROI of these colleges is just upto the mark. I have given the information about about placements, so you can get from their.

But I would you to join AMITY University(in terms of Marketing) , because its brand name. It will aslo help to get placed in off campus & get the exposure. But the fees are bit high.

Also try for the IIM'S.

Good luck!