The Sphere demos werent bigger than mine. As I remember right the indoor demo has had 3 dynamic lights with shadows. My one has 7 and additional simple lights. The outdoor demo wasnt more than a terrain with a bit vegetation and a simple water shader. My one consits of the sponza palace and a lot pillars placed on a terrain (simple multitex) with some simple lights and cascaded shadowmapping.
Eventually Sphere was a commercial solution, LF is free.
I dont plan to extend LF anymore since it lags in several aspects. If it isnt much to tweak I will add the A8 support in about 2 months. Eventually LF has not enough materials/effects to be a suitable shader pipeline for a bigger project.