OSE Advanced vs. Dragonslayer
Both of these systems are described as the simplicity of the B/X ruleset with the added depth of AD&D options, which sounds appealing to me. I'd like to hear about the differences between the two. What do either of them do well that the other doesn't? What makes either of them stand out?
Alternatively, are there other systems that also hybridize Basic and Advanced? What makes any such stand out?