WRONG. Real world would be how long your battery would last vs a 1 hr charge. Let's use GSMArena's endurance rating for the pixel 2 and the iphone 8. i8 has 66hr rating, p2 has a 75 hr rating. After one hour of charge, the iphone 8 ends up with 80% of it's 66 hour rating, or 52.8 hours of endurance. The pixel 2 has 75% of it's 75 hr rating, or 56.25 hours of endurance. It's not a big difference but it's still enough to flip the standings.
If someone wanted the most battery life off of a 1 hour charge between these two phones and they just looked at your chart, they would pick the iphone 8 and then have been wrong. That's the real world. One phone at 75% battery can last longer than a phone at 80% battery. That's the real world.