As per me IIT Delhi and Bits Pilani both are best on own level , here I am telling short info of both institution to make decision :

Indian Institute of Technology, Delhi (IIT) established in 1961, is one of the premier engineering institutes of India.

Courses offered
Bachelor of Technology in Engineering Physics
Bachelor of Technology in Mechanical Engineering
Bachelor of Technology in Production and Industrial Engineering
Bachelor of Technology in Textile Technology
B.Tech. and M.Tech. in Biochemical Engineering & Biotechnology (Dual Degree)


Departments
Department of Applied Mechanics
Department of Biochemical
Department of Chemical
Department of Chemistry
Department of Civil
Department of Computer Science
Department of Electrical
Department of Humanities
Department of Management
Department of Mathematics
Department of Mechanical
Department of Physics
Department of Textile

Facilities
Classrooms
Hostels
Auditorium
Laboratories
Staff club
Hospital
Shopping center
Bank
Post office
Telecom Center
Community Center
Stadium
Playing fields
Squash Courts
Workshops
Seminar Rooms
Music Rooms
Sports

Address
Indian Institute of Technology, Delhi (IIT-D)
Hauz Khas
New Delhi
State : Delhi
Country : India
Contact No : 011-26591710
Contact Email : registrar@admin.iitd.ac.in

Birla Institute of Technology & Science (BITS), Pilani established in 1964,

Courses offered:
Bachelor of Engineering in Computer Science & Engineering
Bachelor of Pharmacy
Bachelor of Science in Maths



Departments
Department of Biological Sciences
Department of Chemical Engineering
Department of Chemistry
Department of Civil Engineering
Department of Computer Science and Information Systems
Department of Economics and Finance
Department of Engineering Technology
Department of Electrical and Electronics/Instrumentation
Department of Humanistic Studies
Department of Languages
Department of Mathematics
Department of Mechanical Engineering
Department of Management
Department of Pharmacy
Department of Physics


Facilities
Hostels
Library
Class rooms
Sports Facilities
Auditorium
Medical Centre
Central Library
Computer Centre

Address
Birla Institute of Technology and Science, Pilani (BITS-P)
Vidya Vihar Campus
City : Pilani
State : Rajasthan
Country : India
Contact No : 01596-242090
Contact Email : webmaster@pilani.bits-pilani.ac.in