For anyone who wants to make plat (works for new players as well)

[Munkh]

I've played on both Red and Blue. The economy is definitely NOT the same. Most items sell for a lot more on Red, but I have found that some (few) items on Red are selling for half of what they go for on Blue.

So you just have to really watch your items. The convenient thing about Red is you are not in anyway fighting for mobs or plat camps at the lower levels. I have found many times that I am all by myself in WK, NK or even zones like Befallen and Unrest. So it's easier to make money on Red, but items are more expensive if you are planning to purchase instead of camp for them.