You cant see the back of the pads in the picture. Do they both go on the same. Some pads just have the straps, whereas others slip over your foot before pulling them up your knee (as well as straps).
Their conformity to pro-jumps aside, which pads are really better. Say you were buying them for skating or snow-boarding or something, so it didn't matter how they filled out the knee bar. Which pads provide the most impact protection, allow the greatest flexibility and can withstand repeated falls?