Ripple is moving reliably. Managers' explanations are all so promising that they will develop so quickly. But I do not think I had the old confidence.
Well in my opinion, you should invest in both of them if you have the money to invest. Both are good and might incur you good money. Besides, it makes the portfolio diversified and that reduce the risk as well. If you invest all the money in one or the other, you might be more prone to loss due to the market fall. And ETH has more potential to grow so better apportion a big part of your money for ETH and the remaining for the other.