Firmware is the same. 106 has only one year of waranty. Though with newegg you can buy it for $205 freeshipping and for extra like $15 you can by waranty for another year. This is the cheapest method of getting this drive and be sure that you will get a replacement if something happends. NewEgg has the highest custoemer satisfaction. They did send me a new LiteOn once when my crapped out. So, I trust them completely. Say, if your 4x Pioneer will "break" in 2 years they will send you 8x or 12x since by that time there will be no 4x for sale. Get my gist?