flak 2.0 xxl

Hi. I have the flak 2.0 xl since 10 years, now I need new one, I don't have a store around here so I would buy from web, I see that they have now the flak 2.0 XXL, I compared the glasses specs, I see that XXL has about 4mm bigger for lenses width and even the frame is about 4mm larger... But it...