i don't know those coin, but i don't like no pow coins, they all look like money grab shit coin, at the moment i would put my money on helium, nexus and picoin, they have nice addition in the features, and their dev are active, nexus is going to launch the new wallet, i'm looking forward to it, and picoin has a continuous airdrop, the dev is very gentle and respond quickly
The cost of the PoW will be the cost of making the coin. So the coin is valuable to some extent.