The verdict
If your main need is to run tests and you want to see the plans before talking to anyone, I'd pick Convert Experiences. It also suits agencies that need separate projects and domains.
If you want to find friction in a heatmap or recording, start a test from there and watch visitors in each version, I'd pick VWO. That closed loop is its strength.
If you only need recordings, neither is the right buy. A dedicated tool such as Hotjar or Microsoft Clarity is lighter. And on a low-traffic site, both will make you wait for results.