Well, the linebacker can carry two LRM-20's with Artemis V and four tons of ammo... and a small laser/light tag/light probe. Then you are done. So it does have better back-up firepower in that regard :)
Of course a Stormcrow carries EVERYTHING (2xLRM-20's both with Artemis V, 4 tons of ammo, 4 ERML, 4 ER Micro Lasers, AND a Probe) for 66 more BV. And more armor IIRC, but then we are talking Stormcrows here...