the only i know is ETC price is cheaper than Ethereum and we can buy much of ETC than ethereum. actually i don't know about ethereume and ethereum classic project, i only know that both is good investment for long term and we can hold it right now as the price is not really expensive to bougt.
What i have noticed in time is that ETC is a very stable (price wise) coin and for the moment i am using ETC as a temporary storage of value.