Vue.js

I've never developed in Vue, personally, just mostly in React. However, I don't think that the framework is that important at the end of the day. Your app will be plenty fast no matter what option you choose, assuming you ensure you are following the guidelines set by the framework, and React is plenty easy if you have enough experience under your belt.

Whats more important is making sure you, and your team, can understand and maintain the code. If more of your team is comfortable with Vue, then stick with Vue. If you're thinking your team will expand, and you want to leverage the fact that React is the better-known framework to have more options for hires, then choose React. Choose what makes the most sense for your team and your application.