Tone is a range of the pitch ...So a skin with a Dark rating will have to be tightened like crazy to get a high pitch (if it's possible) and the Bright skin will be high pitched easily

Sustain is the length of time you'll hear the note after hitting the skin (Ebony Ambassadors have a crazy ringing sound after you hit it) so IMO the more sustain the better because you'll be able to hear the note for a little bit longer and if your skin is tuned to be high pitched, it'll be reallllllly loud.

Durability I'm assuming is how strong the skin is (i.e. from being stretched over your dhol rim)

Honestly, there is no BEST treble skin...It all depends on your taste, because the Ebony Ambassador kinda sounds like you're hitting a patheela (metal-ish sound) whereas other skins may sound a bit different...

I would recommend getting it though, I have it on both of my dhols and I won't be changing them for a looooooong time

which western head is the best? remo or evans?

Thanks @monisingh i always have gbc right now for 2 years and i think it sounds bright with long sustain to my ears 

ive used many different remo heads, but GBC heads are still my first choice of preference. ‎I agree with moni though, out of all the remo's ive tried, the weatherking Diplomat is definitely the best...Sounds wayy better than the ebony ambassador. Ive used the black ebony as well. recently took it off and put a new diplomat on it. overall sound difference is much better. ebony is harder to tune, the diplomat is thinner so its a bit easier to tune and isnt as "metal-ish"

I know its been a while since the last post but jupmasterg are you using the clear diplomat or another I had the clear diplomat it had the remo metal ish sound but not as much as the ambassadors but overall sounded way better in my opinion

ive used many different remo heads, but GBC heads are still my first choice of preference. ‎I agree with moni though, out of all the remo's ive tried, the weatherking Diplomat is definitely the best...Sounds wayy better than the ebony ambassador. Ive used the black ebony as well. recently took it off and put a new diplomat on it. overall sound difference is much better. ebony is harder to tune, the diplomat is thinner so its a bit easier to tune and isnt as "metal-ish"

I use to put remos on my dhol then had some problems i like the desi skins the best GBC! best sound, but u can throw the you old used remo on ur bass side aswell jus poke holes the same way and strestch the plastic with your dagga. You might need to put some tape on the inside before installing it to make it heavier.. but it sounds soo beat ... jus a quick thought aha dont throw away stretched remos u can use them for many other things on your dhol.