Last week, Amazon.com (NADAQ: AMZN) struck its biggest transaction: agreeing to exchanged 10 million of its shares for Zappos.com, a top online retailer of shoes and other apparel items (the price tag was $800+ million).

Because of the size of the deal, Amazon.com had to file a regulatory document called an S-4 form. While there is lots of legal and technical mumbo-jumbo, there are still some interesting details about the transaction.

This post is part of our Battle of the Brands feature. Let us know which brand you prefer, and watch out for more Battle of the Brands posts.

So let's imagine that you like the convenience of shopping attired only in your underwear. In this (purely hypothetical) case, which site, Amazon.com or Barnes & Noble.com, would be your first choice?

With over 40 product categories ranging from books and DVDs to pet food to health and beauty products, there is something for just about everyone on Amazon.com (NASDAQ: AMZN). The site contains your browsing history, which can be either good or bad depending on who's looking over your shoulder when you next log in. Amazon offers 1-click check out once you set up an account, and also offers incentives to consumers who use Amazon's own credit card. Orders over $25 ship free to continental U.S. addresses. Amazon provides plenty of graphics of book and DVD covers, so even if you can't remember the name of the item, you might be able to recognize it from its picture. Amazon also offers a simple order tracking option called Where's My Stuff.

Barnes & Noble (NYSE: BKS) offers a narrower range of products, mainly books, DVDs, and vaguely educational toys. Books are new and used mass market, as well as new and used textbooks. The site is much less graphics intensive than Amazon, but holds more information on titles. Barnes & Noble also offers incentives for customers to use its own credit card and to join its membership program in exchange for discounts. Shipping is free on most orders over $25. Payment is via Paypal. Unlike Amazon, Barnes & Noble includes an 800-help number on the web page. Barnes & Noble targets more serious readers with weekly online book club meetings in which various authors participate in the discussion and Q&A about their books.

So, clad in whatever manner makes you comfortable, what is your preference for online shopping?

Be sure to vote in our poll for B&N or Amazon as your preferred brand, and lets us know why you love it in the comments. Results of all Battle of the Brands match-ups coming soon.