Oh brother 
That pic of Ronnie is from 2007 ,he was still competing
Kai and the guy to his left are the same height
What's next ?
If you crop out Brad's face , he's not that good looking
If that pic was taken when Ronnie was competing, that's a hugely downsized Ronnie. It's not just his shirt making him look smaller. Like I said before, Kai is wearing clothes to conceal his physique. All of the people are taller than he is and the guy on his left is closer to the camera.
Phil is wearing a tight , low cut tshirt, is the same height as the guy next to him who happens to be extremely skinny and they are lined up directly in front of the camera at similar angles and he's currently several weeks into contest prep mode. That is why the comparison is interesting.
Phil's torso is still part of his body. If you crop out Brad Pitt's face, you have nothing to judge his face on. A more apt comparison is covering his eyes or his hair and asking yourself "Does he look like Steve Buscemi now? "
