Fan data comparing for hvac system

I have a fan installed on a blower system that is notupto the customers expectations.

They can not give us data of what they require so I want to compare the upgraded fan with the existing to give them an idea on how much more capacity it has in a percentage.

I have fan curves for both fans but I just want it checked by others and maybe put into a tidy spreadsheet type format
I dont think its a big job but let me know