I think you'll find that you will have a hard time spotting the difference. All of Televue's eyepieces even their plossl's are fully multi-coated with their exotic materials for maximum light transmission. Although most reviews suggest the ethos range have the best views regarding contrast, clarity and light transmission.
All though it might be that majesty factor thing
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In regards to the best light transmission, I think the laws of physics would dictate their plossl range would perform best. Purely because there is less lenses for the light to travel through.
In the end for the end users like you or I, its all subjective, but you can rest assured any one of TV products will provide excellent views.