The import distinction with MMXIV is your personal stake rate versus network inflation. While you are staking MMXIV you are earning 5.5% of your balance every day. At the same time, the network coin supply is inflating by only 4.0%. This is an awesome system and has never been done with a POS coin before.
Every POS coin based on percentage does this. There will always be coins on exchanges not staking, coins being transferred thus losing stake age, coins in locked wallets, coins in closed wallets. etc... The difference with MMXIV was the low initial supply. When you have 10-20% of the coins on exchanges not staking you can actually measure the difference.