Although both IIT Hyderabad and IIT Guwahati are excellent engineering institutes, my knowledge is limited to the BTech in Mechanical Engineering from IIT Hyderabad as my sister is a recent pass out of the same.

Research: IIT Hyderabad in general and its Mechanical branch specifically focuses on invention and innovation. You will be astonished to know that currently there are more than 100 ongoing research and consultancy projects under the faculty and students. The research culture at IIT Hyderabad is stronger than many older IITs even. IIT Hyderabad is known globally for MS and Ph. Ds placements.

The new IIT tag: Being one of the new IITs, it lacks the credibility of the IIT tag. However, it’s the contrary. Being new, it guarantees better facilities and well-equipped labs. The mechanical department has been upgraded with equipment worth 70 crores over the last few years. The Institute has one of the best research environments in the country.

Culture: At IIT Hyderabad you have to learn to master balancing your extracurriculars alongside your academics. You cannot afford to lose on any kind of experience that IIT Hyderabad has to offer. Exploring everything will help you hone your talents to the fullest and identify your passions.

Placements: Here’s an amazing fact, Mechanical Engineering is the first department to have its own Training and Placement Cell at IIT Hyderabad. Moreover, the extensive contacts of the professors (under which you work or study) with industry experts, help you secure off-campus placements easily.

IIT Hyderabad has better opening JEE ranks than other IITs and despite being new seems more promising. IIT Hyderabad CSE is a well-regarded branch and the opportunities offered are excellent. Although the college is located far from the city, it is well connected with road and rail transport within the city. Here are a few highlights of IIT Hyderabad CSE.

• Being new, IIT Hyderabad has young faculties who are zealous and passionate about the field. They are very friendly with diverse areas of expertise.
• IIT Hyderabad has an active research environment and there are many ongoing We have many ongoing research projects most of them in collaboration with Japan. Both PG and UG students are encouraged to take part in research.
• Despite being a new IIT, it does not lack in terms of infrastructure and facilities and has modern amenities for its students.

It is better to talk to the students of the aforementioned institutes and gather information. You can then make a decision based on the collected data and facts. 

Yes, IIT Hyderabad is definitely better than IIT BHU and IIT Guwahati. I have drawn a general comparison between these institutes on the basis of some common parameters 

• Placements: IIT Hyderabad has an excellent placement scenario. 

• Research: IIT Hyderabad is known for its rich research culture and ranks 7th best in India. There are multiple ongoing projects and fields on which IIT Hyderabad students are working on currently. 
• Collaborations: IIT Hyderabad receives funds from the government of Japan that also provides educational opportunities to the IIT Hyderabad students in the form of lucrative internships and scholarships,
• Student-professor ratio: The student-professor ratio is excellent around 10:1 here is 3rd largest among other IITs.
• Courses: IIT Hyderabad is open to recommendations from students regarding any change in coursework 

Trust me, the new IITs have so much potential but unfortunately their recent establishment is considered a flaw. While IIT Guwahati will shape your future better, IIT Hyderabad will give you opportunities you never knew existed.