BenQ reports jitter, and LiteOn, so far, doesn't. I have both BenQ and LiteOn drives, and as for which is more accurate, I don't know, but I guess I'm more used to LiteOn scans.
As for the more expensive of the two...I think it depends where you are, you'd have to check prices and compare. Here in the UK, both my BenQ (originally a Phillips 1660) and my LiteOn 1693S were retail drives, and I paid a bit more for the Litey.
Whether you buy retail or OEM (or bulk) would create a difference in price also.
Make a list of your chosen sellers (online or B&M), then just price up each drive, and see which turns out to be the cheapest.