One specific point about the Type 6s: they're great if you're using both eyes. The eye relief is adequate for bino-ing (provided you don't wear glasses), and the fact they are so light and compact is a huge benefit. You can get them very close together if children are using the scope, for example (way down to 43mm spacing, which is enough for anyone human). And no balance problems.
I have a pair of 11mm T6s which are more or less permanently attached to the bino, except on those special occasions when a second Ethos happens along.
