The SOT-23-8 package is a standard surface-mount footprint shared by many voltage supervisors and small logic devices. The supplier device package is also SOT-23-8, so no footprint variation between the two identifiers. If you are replacing a supervisor in a similar package, confirm the pin-to-pin mapping — the MAX6366 uses an active-low open-drain output, which may differ from push-pull or active-high alternatives in the same footprint.
No official replacement or second-source alternate is listed, so for dual-sourcing resilience, consider a functionally equivalent supervisor from another vendor with the same threshold and package — but verify the reset timeout and output type match your design.