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often the extra elements are added to increase the fov & help out with eye relief. they are not better, as they really need to be made better as you are losing small amounts of light every time you pass thru a glass surface.
there fore some of the best ep's are the simpler ones (eg orthoscopic) if you want max clarity on planets try an ortho, maybe even an edmonds RKE (3 elements)..keep in mind most ep's badged plossl are cheap rip-offs of the true design, plossl are excellent, but most of the ep's badged plossl are in fact symmetricals plossls
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