I like them both but Ethereum's scalability issues scare me sometimes. I missed out on an ICO in October because of the Crypto Kitty fiasco. Only glaring advantage on the surface I see is NEO's 10,000 transactions per second vs ETH's 15 yet ETH has the name recognition and tons of projects already on the market so it comes down to personal preference.
That's a good point about the scaling issues that Ether has. It's a common issue to get locked out of ICOs because of it. We'll take that into consideration on our end.