Comparison

BusinessProxy vs a device-wide VPN

Both give controlled access. The difference is scope: a device VPN routes the whole machine; BusinessProxy stays inside Chrome.

CapabilityBusinessProxyDevice VPN
ScopeChrome onlyWhole device
SetupChrome extensionOS client per device
Non-browser trafficUntouchedRouted
Category filteringBuilt inVaries
Best forControlled work browsingFull network access

VPNs are the right tool when you genuinely need full device-level access.