is it lighter then other b series flywheel.

 

yes. type r is 12 lbs and others are, i think, 18 lbs

 

Yes, it is lighter.

 

should i upgrade to a lighter flywheel like fidanza. or should i just keep the same one

 

Should i switch it to a lighter one like a fidanza. and sell my type r flywheel

 

Whatever you want....we're not here to make decisions for you.
Do some research on what others have done, and make a choice based on what you read from their experiences.
The great thing about honda-tech is 99% of whatever you want to know has been covered before - Just search a little and you will usually find exactly what you want, without having to make a new thread.

I have an itr wheel and think its great....