Personal observations if helpful...
I own a 182P and my good friend and hangar neighbor owns a 206. Flown extensive cross-country’s in both. We were both surprised the external dimensions of the two planes are nearly identical. The 206 has a (edit: 285HP) fuel injected engine verses my 230 HP engine, both are Continentals.
flying both planes I prefer the fuel injected engine as it can be run at lean of Peak. The 182’s O-470R has unequal intake runners making LOP difficult. I also prefer the 182’s shorter curved corner glareshield over the more squared taller 206 glareshield. Although this point is minor.
If you’re carrying lots passengers or especially cargo, the large side door for easy entry is appreciated. If the plane is used for camping or hauling mountain bikes on trips, the 206 reigns. I tend to prefer 2 front cabin doors As two in the front are the dominant seating usage for my own missions. When hauling I just remove the aft bench seat, but still need to fish the bikes through a front door.
Both planes are very similar with slight and distinctive differences to better tailor to your mission.
The extra HP and wide aft doors of the 206 is a big help when loading & heavy. The 182 is more nimble and slightly better eternal visibility.