vPanel 2.0 - "SIP Address" vs. "Softphone / BYOD"?

The new vPanel 2.0 now has a new feature section called "SIP Address". It references the use of "xxxxxxxxxx@incoming.voipwelcome.com" while the Softphone/BYOD feature section references the use of "xxxxxxxxxx@sip.voipwelcome.com" instead. I've successfully registered my iOS device using the Softphone/BYOD settings, but I'm not sure what the SIP Address settings are for? Anyone?

Your SIP address is your SIP phone number—meaning, anyone using SIP should be able to call you directly using that address and bypass the Public Switched Telephone Network (PSTN).