I can't answer the question on comparable bikes....but you might want to look at cross bikes *if* you can find something with a short enough top tube (on most cross bikes, the top tube runs a size longer than the frame measure would indicate).
Drop bars will give you more hand positions, and riding in a road position will generally be more efficient than riding an more upright hybrid. Cross bikes can be a nice compromise - the road "geometry" with the ability to take fat tires should you want to ride gravel, etc. I think the difference in shifter you're seeing (under the brake versus out to the side) may be amongst the different levels of shimano shifters - but it's hard to say for sure without more info.
It really depends on what you want the bike for - what are you riding goals? Trails? In town? Country roads? How far do you want to go, and do you want to get there in a hurry?
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