Why is Barnes & Noble performing well while Borders is bankrupt?

Why is Barnes & Noble performing well as a business while Borders is near (or has even reached) bankruptcy?
What is so different about how they are run?
1.Failure to adequately address the internet sales channel and the subsequent ebook market.
2.Poor real estate strategy – Borders leased space that was too large, the storefronts did not compare well to B&N, and they were complacent in picking and relocating existing stores to the best locations.
3.Over-investment in music – while this was a big plus for this in the early to mid 90’s, this was a disaster in the long run.
4.Over-reliance on assortment size to compete as opposed to efficient operations – Borders was renowned for its wide and quality assortment of titles.
5.Failure to build efficient systems and processes