I would definitely choose 1 BTC over 10 ETH. Some say it's not advisable to hold BTC with the incoming event on August 1. I personally think that I should hold BTC instead of ETH. The potential of BTC is higher than the potential of ETH on raising the price.
But what about what I said ? The trick is to get more bitcoins at the end. For this you buy ETH using fiat money - and this is very important ! - and then you win in both because the amount of indirect bitcoins you bought increase because ETH price increases, and in term of fiat you are winning too because Bitcoin price rose.