I would choose NEO
Overview of NEO and Ethereum
Although both provide developer capabilities, their goals are different. The summary is as follows:

The goal of Ethereum is to create a platform for developing Dapps and "Internet 3.0 - a globally accessible, free and reliable Internet network."

NEO is a project that uses Blockchain technology and the ability to identify assets, automate the management of digital assets by smart contracts and to create a "smart economy" "With the hierarchy.

Say it out loud, analyze the goals of the two projects. It is important that both platforms share the same features but the brand is different.

Ethereum: The goal is to become the foundation for Dapps and they are having market advantage right now. Their roadmap allows users and developers greater control with more options in the application.

NEO: is gradually developing products for the future. They just changed their name from Antshares to NEO in June, 2017, focusing on marketing but great success. NEO's goal is to become the foundation for a smart economy with the same technology as Ethereum.

In short: Ethereum is evolving to meet new needs. NEO is developing the platform for the future in the future.