Here is a picture comparison of 2 pigs from the same litter. The red one has been fed little and allowed to free range and forage for whatever he can find. The other pig has been confined in about a 12 x 12 pen and fed. Both pictures were taken on the same day with the camera held about chest high so they should be pretty accurate.

My guess is when they are butchered the red one will be much leaner than the black. Then again all that can’t be fat either.