in thier model names. What is the difference/prefference if any? Yes I did a search & read most of the FAQ (266 posts!) & I see many referring to both rather interchangeably (<-- is that a word 
) but I just wanted to be specific. Iām going to get me a Lite-On 40x12x38 at a local retailer this Friday (my X-mas gift to me) & just wanted to be sure. TIA
And here I thought we would get through a whole week without seeing this question posted.
How about THIS thread.
Or, THIS one.
hehe LOL! =)
Both are good. just buy one. 
/Dyzan
there is no such thing as a 40x12x38 drive.