Epic vs Unique same %? (p/c) (scania)

Is unique 6% luk on lower level (< lvl 71) worth more or epic 6% on lvl 71+ gear?

I ask because even though they are the same percent one has more potential (to recube) to higher, but some people aren't looking to recube, but i don't see many epic or unique gear that has crappy potential that people sell.

What is the avg price for 6% and 9% equipment? I saw ranged from 300-600m.

6% epic is worth more than 6% unique if the item is below 71. If anything, they should probably be close to the same price.