The youngest chicken possible, pumped full of saline and water so that when cooked and you cut it with a knife, the cross section looks like playdoh. It has no texture. There is no "grain" to the meat.
A chicken breast today (not fed on chemical feed) is £8-£10 each from a decent butcher or a farm.
You can get chicken breast from a cheap supermarket 10 for £2.99.
These aren't the same thing.