Between the two, I use only Eurail.com. I always have the Pass mailed to me after placing and paying for the order on-line, since the paper Pass is the only form I use. No concerns about carrying the paper Pass every on the trip. Only once did I have to pay a shipping fee, all other orders were free of that fee. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.