[CA] I70 vs A7

I have an I70, I60, AIS650, Ray260 and P70 on my system and plan to add a second I70 to my system. Currently there are A7 mfd at a very attractive price. could an A7 mfd display more, less or similar data than a I70. is it reasonable to consider an A 7 " mfd display as an alternative to a second I70?

The system has a larger C series as the main MFD for charting radar etc.

thanks

David