yes, you want to consistently eat protein day in, day out. the body adapts over time, so if over time it sees plenty of availble protein for muscle repair, it'll use it for that.
in general, yhou should eat the same way everyday, because every meal is either post workout/recovery nutrition, or pre workout nutrition.
my best analogy is that the body is like a steam engine train. they constantly stoke the fire for the boiler, so they have consistent results...it never gets too cold (train slows down) nor do they smother it by adding to much fuel at once (train slows down).
The body is really just a biological engine. Keep it running at a consistent speed for optimal results, whether its bulking up or cutting fat.