Of course, no two e2ee protocols / features / apps are created equal. There will be differences, sometimes subtle even (as it is with all cryptography, whose guarantees are broken even due to the slightest misuse). You’d have an easier time if someone (preferably multiple independent experts) had already put in the effort to compare / review the two.
For now, in the matters of e2ee, it might be a bit too premature to rely on a LLM (like Devin or Copilot) for crypto-analysis of the codebases (unless you know how to prompt and what to look for), though it is definitely worth a try, and you may use it as a hint and then you draft questions to the app developers (I imagine they’ll otherwise get annoyed if the questionnaire was itself authored by a LLM).
That said, since Ente Locker is not meant to be a generic Drive (they’re giving it away for free for whoever is on Photos paid plan), I’d not use it as such: Ente Locker - New app from Ente - #19 by vishnukvmd
Additionally, specifically since you’re worried about privacy, you may want to consult the respective privacy policies (ente) and ToS (ente).
The best bet of course is to self-host a solution yourself (possible with Ente, and I believe they have plans to make self-hosting “1-click”), but that brings with it its own effort & head-aches.