In some niches, yes. Ezoic has a level system, where you can get access to higher-paying ads as your traffic increases. When the visitor amount to your blog is the same as the minimum requirements for applying to Mediavine, the Ezoic revenue is also quite similar to what you'd get from Mediavine. For lower traffic sites the EPMV is a bit lower, but they couldn't get into Mediavine anyway so it is not an alternative.