People who think hardware stuff scales linear with and in equal proportion to the hardware "numbers" are quite out of touch with reality tbh. Imagine a fully loaded CPU core that needs to feed extra available GPU resources. How would that scale in your opinion? Couple that image with a 8 core CPU that isn't particularly powerful on the single core scale. Say you would be having 2 cores dedicated to feeding the GPU and doing audio for instance and this keeps things running those to cores at 90%. Now up the GPU specs 50%, without increasing dedicated threads for rendering. How much more stuff would you be able to pack into that "graphics performance increase" do you think?
In essence the guy is right. Both will have their perks, both have better specs for one or the other thing. But since making a high performance game that is high quality asks for a balance of AI, Sound, Design, GFX, etc. You'll soon realize that what he says holds water. That he makes it sound over simplified and the fact that the PS4 packs more raw GPU power and the XBONE packs more CPU power also holds water. For all intends and purposes everyone is right. Stop getting your panties in a bunch when someone says something you have no experience with and doesn't overlay with your believes 1:1.
Ample fact list:
PS4 GPU is a bunch more potent than XBONE GPU.
XBONE CPU is more potent than PS4 CPU.
Gaming uses a balance in resources.
Making a good game requires all assets to be put to good use.
Different approaches prefer different resources to achieve the same goal.
Raw numbers do not equal practical performance.