when dieting hard and resting your body doesnt become broken down wich makes your metabolism struggle to repair itself, muscles stay full, immune system isnt compromised, fat loss is consistent
when training hard and eating right, your body struggles to repair itself, causing a sluggish metabolism , because one hard training day cannot be followed by a consecutive hard training day, you might get away with it two days in a row but not 3, and if you try to keep pace everyday your appetite will just be crazy and not be able to keep up with the soreness and inflamation of high volume training no matter how many fats/proteins/ carbs you consume, it will be like a constant soreness if you really want high volume training in your life and be lean also