The client determines the settings interface, system integration, and workflow. The core determines supported configuration fields and protocols. The subscription provides the details needed to connect. They’re related, but they aren’t the same thing. First check that the package works on your device, then make sure the client can read your configuration. That’s more useful than choosing by software name alone.
Before switching clients, back up your subscription link, local overrides, rules, and proxy group selections. Reimport your subscription and confirm it connects with the default settings before restoring customizations one at a time. Copying the entire data directory may carry over old ports, paths, or service settings that no longer apply.
If the same subscription looks different in different clients, the cause may be differences in format, core support, or override behavior—not necessarily a need to download it again. For a detailed comparison, see our client comparison. If you’re having connection issues, follow the steps in FAQ to troubleshoot them one at a time.