Because MEC truly has things to set it apart, and has the flair to make it look more promising. MEC's website (as well as translations) and forums help contribute to this. Then there is the client which looks and operates much better than pretty much any other coin wallet.
DGC has things like the exchange coming from Baritus, but that needs more confirmation; it needs to be released to help DGC.
MEC distribution might be one reason it's so "successful":
The Beginning: 1st 5 months, 21 million coins will be generated
Total coins: 42 million
Otherwise same block times as Litecoin, 11 languages website.
Coin distribution alone would be a reason for me to call this coin a "scam" or a "tulip", but that's just me.
Im still betting on DGC, its just that its pretty stressful to see it fluctuate between only .09 - .11 the past couple days
Robert, don't worry about the fluctuations. They are very important or else traders have no margin. Just hold many of your coins. DGC has risen and will see its breakthrough after some of these tulip coins are no longer mined (or "pre-"mined): I see no incentive of mining a coin that has effectively given its early adopters (say the first 5 months) an unproportional advantage. Anyone mining it after these 5 months must feel stupid or be stupid to be screwed over like that. But hey, everyone is free to mine what they wish.