You're not going to increase connection reliability/extend your wifi range by enabling radius. If you have any understanding of what's happening here, you wouldn't even ask this question.
What I’m wondering has nothing to do with signal strength. I’m wondering if the protocol differences have any effect on reliability in situations where the wireless connection is less reliable. Because, for example, there’s less negotiation on reconnecting to the network or something.
After all, reliability is a cross-cutting concern :)
Unfortunately it's hard to beat a PSK based exchange in terms of quick connection, particularly with something like this where the authentication server is moved external. The difference in reconnection time is, in general, extremely marginal though. If the Wi-Fi is bad enough your client thinks it actually needs to reconnect instead of retransmit the only meaningful respite is to solve that problem directly.
