6 Pro Solar v 7 Solar Sapphire

I had an issue with my fenix 6 pro solar (solar intensity no longer being picked up or charging the watch) and Garmin have offered to replace the unit with a fenix 7 solar sapphire for a fee of £159. Is it worth paying for the upgrade? There doesn't seem to be a great deal of difference between the two, especially the base 7 rather than a pro.

Thanks!