Both the LG and the Pioneer can use UDMA 4, which helps them burn at high speed when used in an external enclosure.
Personally, between my LG H22N and my Pioneer 111D, I prefer the Pioneer, which gives better write quality to a bigger range of DVD media than does the LG. There's region free firmware available for both but the Pioneer is a much faster DVD ripper than the LG, faster even than my BenQ's.
With the right media, the LG gives great writing quality and very fast burns, but it seems to have a particularly long disc recognition time which can be annoying.
KHypermedia 8x4x12 (BenQ 800 clone) B2L7 BenQ DW1655 BCIB BenQ DW1650 BCIC Samsung SH-S182M KC03 LG GSA-H22N 1:01 TDB Lite-On SHM-165H6S HS0E Pioneer DVR-111D 1.29