Go for ETH. ETH is the future. Ethereum core has ten times more talented people than ETC.
It is possiblle that even ETH doesn't last much. For sure, there will be better options than ETH.
But since there are only two options , I'll choose ETH.
Also ETH will be migrated to POS and ETH will be stronger and the price is raising up because this, although someone choose ETC for short term you can treat ETH as your long investment because this POS event;.