I've been mining LiteCoin (LTC) for a while now, and I have noticed that amongst the various Scrypt coins listed on coinwarz.com, there seems to not be a direct correlation between the coins' difficulty, hash rate, and how many coins you can expect per day.
For example, the rate on LTC seems to be that 1 Mhash + 1000 difficulty = 1 LTC per day, nice and simple, but this is not so for other coins.
At my current 4 Megahash mining rate:
LiteCoin at 1032 difficulty gets me 3.89 per day.
Feathercoin at 213 difficulty gets me 75.2 per day.
Bitbar at 2.65 difficulty gets me ONLY 6.45 BTB per day. What the hell?
Novacoin at 282 difficulty gets me only 2.77 per day. WTF?
Digitalcoin at 3.23 difficulty gets me 498 DGC per day.
Bitgem at 0.80 difficulty gets 40 BTG per day.
What is it about these other Scrypt coins that there seems to be such a wide variance? I'd think that a low difficulty = more coins, high difficulty = less coins.
I know that not all coins give the same number of coins per block, but this still seems way out of line.
You need to keep in mind block rewards and block times.
FTC is similar block time with 4x rewards so its easy to see.