It's ultimately a matter of personal preference. EVA is lighter. Both grips are surprisingly durable, but the EVA will hold longer as it is non organic. The cork we use though, is compressed cork, which means it is very durable compared to other cork grips in the market.
Either way, the grips can be replaced if you decide you don't like the ones you have or they wear out. For more information about the debate between cork and EVA, read this blog post: https://cnocoutdoors.com/blogs/blog/once-and-for-all-cork-or-eva-handle