If it does now , it should. The caveat is P25 Type 1 vs Type 2 and if the radio is so equipped. I will confess as well, that sometimes the descriptions in CPS leave a lot to be desired and you might find it does not just by checking that box. Motorola seems to have lost it when writing SW help files. The CPS manual would be a good start.
Some background:
SmartNet was single site or simulcast architecture. SmartZone (SZ) is an architecture that permits roaming between sites that are networked together. However, a SZ system can be simulcast without roaming. It is a product development progression. The current ASTRO 25 is like SZ in many ways but brings the 9600 CC and loses mixed analog/digital mode.
A site can be one tower or multiple in a simulcast configuration. When the radio is doing SmartZone, it has roaming features that look at signal strength and BER of the current site as well as any adjacent sites. There are thresholds and timing parameters that tell the radio when to look at the control channel of adjacent sites, to build a list of good adjacent sites, and to switch to them when the current site fades. If you are strictly doing simulcast, those parameters are unnecessary.