LSA is lobe separation angle which is the angle between the intake lobe centerline and exhaust lobe centerline...
So if you isolate all other cam properties and just focus on lobe separation, here's what you can reason out:
A larger lobe separation angle has the lobe centerlines FARTHER APART, a smaller lobe separation angle is where the lobe centerlines are CLOSER TOGETHER... If the lobe centerlines are closer together, then there will be more overlap of the intake and exhaust valves being open at the same time together which will lower cylinder pressure... With the lobe centerlines farther apart, there will be less overlap of the valves being open at the same time and the cylinder pressure will be higher, therefore giving more torque...