I guess in global view, comapred to XMR we have more honest distribution, at least because we have more fair emission curve:
I'm not sure why one curve would be any more fair than the other.
Does XCN have a more fair emission curve because it has a 10-year half life? Would 20-years be even better?
To me "fair" means that the rules are clearly defined and those same rules apply to everyone.
Different emissions curves might have practical advantages and disadvantages, but fairness is not among them.
I agree about clearly defined rules, it's definately an indispensable part of fair distribution.
But also i think that faster emission makes less interest for late joining the currency - in long term view, so i think Bitcoin emission curve is closer to be fair.
Closer perhaps but it is still quite easy to argue that it is "unfair" if this is your definition of unfair. Bitcoin is about 75% mined and most people on the planet have no idea it even exists. Even most people in developed countries with good access to information and access to computers have barely heard of it if at all.
Now I don't happen to think that is "unfair" as I said earlier, but if your definition of fairness includes wide access to large amounts of newly issued coins to late adopters the Bitcoin's curve is also grossly unfair.
The thing is, you can't really know this in advance. When Bitcoin was created, nobody had any idea if it would ever be remotely successful or how long it would take. Likewise for newer cryptocurrencies. So if you are using the model of a fixed curve defined in advance and trying to make this curve track adoption (even in some loose sense )you almost can't help but miss the mark.
And as you said, there are also practical advantages and disadvantages. But let this out of scope, say you launching new coin at this moment, what emission curve would you select for this ?
I don't know. There are all sorts of considerations, and I'm sure you have considered many of them.
From a strategic point of view I might try something that is deliberately outside of the range already crowded with existing coins. I give the XCN guys credit for thinking a bit outside the box and trying that.