This is interesting. When I saw the comparison video (from GEMS) I thought ELFX looked much better. However, these screen shots lead to a different result.
ELFX has some nice shots, but I actually think the shots in row 7 and 8 are really, really bad. I also prefer the vanilla to ELFX in rows 1, 9 and 10. RLO has some really great screenshots there, but I don't like the photos in rows 4, 6 and 7. I think the problem is the light seems to stop suddenly and turn immediately into dark shadow with very little blending. ELFX Enhanced might be a nice compromise. I don't like it as much as RLO in most places, but it offers a middle ground that improves on the screenshots I hate from ELFX and the shots I hate from RLO.