Front vs rear shade difference makes one darker?

[Robustacawwfee]

I’m an end user:

My current setup is 5% sun strip, 35% front doors, 20% on the rear half and rear windshield. 

My question is: if I redo the rear half as 5%, will it make the front windows look darker than they look now?

Alternatively, if I redo my front windows from 35% to 20%, it will it make the rear look darker than is already is now?

[TintDude]

Yes, from the outside it will seem a little darker as there's less light coming in in either scenario.