Zippy-H 5S 4000mah 25C pack Eagletree run w/ pics

[Mister-T]

I have both. But I can hardly see a difference quality wise there are both great, performance wise I can't give an accurate and truly "scientific" value.
I think zippy R are better mostly because they use large wire and cells are spaced with a small layer of foam between each which help to reduce heat