Are these two lines practically interchangeable? Because I'm not sure exactly which I need to get.

https://www.deloreango.com/us/oil-delivery-pipe.html
https://www.deloreango.com/us/auto-cooler-hose.html

Also, the color of the fluid inside my A/T cooler pipe (the brass one) came out black, while the fluid from the dipstick comes out red/pink?