The only difference between ethereum bitcoin & other altcoins, is that BTC and ETH are never goign to stop going up, that is why i think that it is more than difficult to choose between btc and eth.
Both coins are very promising. But I like the ether more. It seems to me that this coin can give me more profit than bitcoin.
Both eth and bitcoin are very good for long term and profitable. Since you like more ether anyway it is okay because there are many smart contracts for ethereum. So for me both I had btc and ethereum for me to earned big in the long run.
These coins are coins that have good potential for us to keep in the long run, and let's say we buy both, and we'll get a big advantage when both will go up, and let's say you better choose one too okay if you prefer to choose Ethereum is also up to you.