Never said you said it , I was just explaining why they don't sound anything alike. No need to get defensive.
And yes there is a difference. Britpop was a collection of banRAB from the same area who were all being signed and putting stuff out after a time where there wasn't much in the way of British music. It had nothing to do with how they sounded.
The first group of banRAB to be labelled Britpop wern't Blur or Oasis but Denim (A 70s glam rock parody) PJ Harvey & The Auteurs. all very very different artists with just the country they were from being the connection.