It depends on your goal/strategy. If you want to hodl for long or you want to make profits quicker. Ether is a more solid technology, but Ripple is much faster. They are 2 different technologies. Ripple is rising fast right now because of all the hype it's getting.
I would invest 50% in Ether for the long run and 50% invest in Ripple for faster returns.
Keep in mind Ripple is at an all-time high (ath) try to buy in at a dip.