looking at the geometries between both frames, they are essentially the same. looking at size medium, head angle is 71 on both, top tube is 23" on both.
some differences:
chainstay - 16.7" for SL and 16.9" for BXC, which is probably negligible, but shorter stays do translate into something a bit more maneuverable in the air and in the corners, for what it's worth.
BB height - 12.3" on the SL and 12.8" on the BXC, again making the SL a more free ride friendly rig.
fork travel spec - 125mm max for SL, 100mm max for BXC. again AL wins in the all mountain trail ride category.
this is purely comparing the two frames by the numbers. your preference may be completely different. although looking at the numbers, it would seem that both bikes would do well as trail bikes for smaller/lighter riders who dont want the added weight of longer travel free ride bikes.
some differences:
chainstay - 16.7" for SL and 16.9" for BXC, which is probably negligible, but shorter stays do translate into something a bit more maneuverable in the air and in the corners, for what it's worth.
BB height - 12.3" on the SL and 12.8" on the BXC, again making the SL a more free ride friendly rig.
fork travel spec - 125mm max for SL, 100mm max for BXC. again AL wins in the all mountain trail ride category.
this is purely comparing the two frames by the numbers. your preference may be completely different. although looking at the numbers, it would seem that both bikes would do well as trail bikes for smaller/lighter riders who dont want the added weight of longer travel free ride bikes.