If you’re going to tow something (as opposed to just using it for a bike rack) then OEM without question.
It comes with Trailer Mode in software, which disables certain sensors, calibrates AP for towing, includes wiring for trailer lights and a brake controller, and of course it will be installed right without fear of galvanic corrosion.
From the Owner’s Manual:
Some Autopilot features, as well as rear parking sensor functionality, may not be available when Trailer Mode is enabled. In addition, these features operate differently:
• Traffic-Aware Cruise Control increases the following distance from the vehicle in front of you.
• Side collision warnings are active but automatic steering interventions are disabled.
• The braking force provided by Automatic Emergency Braking (see Collision Avoidance Assist on page 113) may be limited. Therefore, stopping distance may increase.