Unless you intend to just do a bit of day trading to make some money, please don't invest in either of them for long term growth – you will lose your money. You have definitely missed the boat on both of these - they have had their initial mining booms and are now in the inevitable slow decline experienced by all altcoins.

Vertcoin - Is ASIC resistant, meaning what? That the tiny global community of altcoin miners, won't have to compete with expensive ASIC rigs, for a coin that has no demand, and that no ASICS are mining anyway? Useless.

Mintcoin - The mining period ends in a week or so, at which point miners will point their rigs elsewhere and all the interest in the coin will die. The smart people have already sold out, and most of the remaining people will try to sell near or after this date, and the price will plummet. When the minting period starts, those left with the coin will watch happily as their stash of coin increases, but seemingly unaware that the value of each coin is decreasing in direct proportion, thanks to a little economic principle known as inflation. In order for the value of their holding to actually increase, the coin will need considerable outside investment. But who would by an inflationary coin that no one in the real world has heard of?

All these “innovative features” are fine, but they absolutely have no impact on the long term value of a coin. Neither do “strong community”, “good devs”, or any of the other things that people claim as to why their coin is going to be the next Bitcoin. The *only* thing that matters is whether people going to actually use the coins, and pay real money for them. The only coin in this category at the moment is Bitcoin, and the only other coin to have remotely made an impact in  terms of popular penetration and adoption is Dogecoin. Neither of these coins has any especially distinguishing “features”, and that doesn’t matter at all. That’s not to say that a coin with some innovative features won’t one day be created and become successful. It’s just that those features have to address directly, that one question that matters– will regular people actually use and pay money for this coin.

You can still make money mining a new coin early, then getting out as soon as you can, or by day-trading and making small gains as prices go up and down. But don’t get caught up in the hype.