You are interested in knowing whether these are the same.
You are interested to know whether these are the same.
I'm interested to know the best way to answer.
I'm interested in knowing the best way to answer.
Yep, pretty much the same.
September 22, 2018
More or less yes you basically say them using different context but they mean the same.
September 21, 2018
Still haven’t found your answers?
Write down your questions and let the native speakers help you!