Both aren't particularly useful, however.
Seems to me that these days, nearly every ASF has 41+ armour on every facing, maybe excluding the aft on some lighter designs.
When it comes to the raw chance to hit at all against an ASF, from the ground, I think the LAC/2 might have a place as a Flak if the carrier just stands close to it's charges. Yes, an LBX would on average be better, but you get only one chance to hit. Of course, you're worse against everything else in return.