I always see AA and LAN 767s at Barajas and assumed they were 767-200s, until I booked on LAN and realised it was a 300. So did some digging and found that 767s could come with the following options:
4 doors and 4 overwing:
Six main entry doors and two over wing
Six main entry doors and a smaller emergency door behind the wing
It is strange how the two over-wing exits and winglets make the aircraft look much smaller.