Does 256mb vs 64mb of hdd cache make a significant difference?

[Linker]

I need to buy hard drives.

There are two on newegg, one the 2018 model, the other the 2016 model.

https://www.newegg.com/Product/Product.aspx?Item=N82E16822184773&ignorebbr=1 (2018: $64)

https://www.newegg.com/Product/Product.aspx?Item=N82E16822178993&ignorebbr=1 (2016: $54 w/ sale)

 

The main difference between the specs appears to be a 64mb cache on the 2016 model, and a 256mb cache on the 2018 model.

I need two hard drives. One will be a Steam library and a small file backup, and the other will be a major file backup that is used much less often.

Ideally I want to spend less money, and considering there is a $10 difference what should I do?
Both 2016, both 2018, or mixed?

Any help is appreciated.

[Jurrunio]

Think of the blue line as having 256mb cache, red line as 64mb cache during a large file transfer (the drop on both lines should be much steeper though). I won't pay $10 more because that but if speed don't really matter to me, but that's up to you

[Linker]

1 hour ago, Jurrunio said:

Think of the blue line as having 256mb cache, red line as 64mb cache during a large file transfer (the drop on both lines should be much steeper though). I won't pay $10 more because that but if speed don't really matter to me, but that's up to you

Did you make that graph yourself?

Thanks for your opinion. Probably going to go for the cheaper one then, at least for my backup drive.

I might consider the cache on the steam library, but probably not.