Banana Republic's quality is so superior to that of Zara's that they're not even comparable. IMO Zara is not much better (maybe even worse) then the junk they sell at Zellers LOL!
Zara has shit quality. Some of their clothes look okay but quality wise YUCK! Their fit is horrible too. I bought a jacket from them and it was the most disappointing piece of clothing I've ever purchased. I check out their stores from time to time and they haven't improved they QC at all.
I wouldn't wear Zara's stuff even if they were free. DO NOT BUY ZARA!