I will answer my own question. After taking a chance and purchasing the DW316 it does in fact burn DVDs as I thought it would. 
Does the DW316 burn DVDs? The description says 'This drive can read/write CDs, and read DVDs effectively providing users with full optical read capability in a single device.' which makes it sound like it can only read DVDs.  I wanted to make sure before buying. Thanks
Dell USB Slim DVD±RW drive - DW316