thanksThe battery can be replaced at a later date but memory cannot. My battery has been below 87% for the last year and isn’t a problem so, in your situation, I’d go for 256 GB and wait until your battery becomes a problem before replacing it (it could be a year or more).
point is ,while 425 for an iphone 11 pro max may be worth it ,im not sure 600 is .especially if you have to add 75 bucks on top to replace the battery,which would make the price hover around 700 euros for a 4 yo phone.thats why im doubting