The software can be identical while the installation requirements differ substantially between an indoor garage and an exposed exterior wall.
Start with the constraint
Outdoor controllers need an enclosure and power arrangement rated for their exposure. Indoor units can be simpler and cheaper when a dry protected location exists.
What changes the decision
A weatherproof box can reduce Wi-Fi signal and make screen or button access less convenient. Direct sun and temperature extremes can also affect electronics.
What to verify before buying
Choose the installation location first, then buy the controller version designed for that environment rather than trying to weatherproof an indoor-only unit afterward.
How we research smart irrigation
We compare water source, delivery method, zone or plant capacity, local fallback controls, schedule logic, connectivity, sensors, pump or valve compatibility, subscriptions, and what happens when internet service is unavailable.
Prices, specifications, firmware, inventory, and configuration-driven features can change. Check the current manufacturer or retailer page and local requirements before buying or installing equipment.