Hmm ... strange ... maybe LiteON implemented Labelflash (LabelTag) support in that firmware at the request of their respective OEM partner (might be Acer?) ... if they would have released publicly the equivalent iHAS drive based on their iHAS numbering system, that would make it equivalent with an iHAS520. They never released an iHAS520 drive though ...
The only 20x drives from the A6 family LiteON released were iHAS120 and iHAS220.
Labelflash support is all implemented in software, it doesn't require additional hardware support like in the case of Lightscribe, so hardware-wise your unit should be the same as an iHAS120.
You can corossflash to an iHAS120 but if you do, after crossflashing you won't have LabelFlash support anymore, but in return you'll have a much newer firmware which should offer better writing quality, especially in terms of CK's patched version I mentioned.
If you really need Labelflash support then you'll have to stick with the existing firmware, since you will not find any LiteON firmware which supports Labelflash, because LiteON never released such a drive (except to some of their OEM partners it seems...). Well, you always learn something new :eek: