The Interceptor and the CBR are both wonderful bikes. I remember when the Interceptor first came out, back in the 1980s, one magazine reviewer called it 'God's Own Sewing Machine'. It was 'The Bike That Does Everything Well', a mild version of a sportbike that was more general purpose.
The CBR is more of a single-purpose sport bike, almost like a racing bike for the street. Yes, the CBR is lighter and probably faster despite fewer ccs. But it's not as comfortable. It has a tiny, hard little seat like a race bike. It has a narrow powerband up towards the top of the RPM range, so you have to keep it revved up to get the power out of it (the VFR is famous for its wide, smooth power band). The steering is twitchy and critical and unforgiving. The riding position is extreme (probably not as much of a problem at your age as it would be for me).
So yeah, if you want something lighter and more sporty, that's what you want. Just be aware of the compromise, what you're giving up for what you're getting.