Is IITH better than IITBHU or IIT Guwahati?

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.