As far as pressure and the direction of force goes, the way he constructed the inner 45 degree piece would withstand greater resistance mathematically than the picture posted. (Not by much though, pretty much insignificant amounts)
Although, im not sure why he had to make it so complicated on the outside portion of the 45. cool points maybe? seems like everyone is getting a boner over it.
all bullshitting aside, it is decent craftsmanship