Go with weight flow
But the pressure you exert (pounds per square inch) is always changing; it's a dynamic force while weight is static. This is why a 170-pound golfer in spikes doesn't damage the green, but a golfer on a crutch leaves a trail of holes. Pressure is how your weight is concentrated.
At address with the irons, pressure is concentrated approximately 50 percent in the front foot, 50 percent in the back foot, with the toe/heel distribution between the ball of the foot and the heel. At the top of the swing there has been a pressure change (60/40), with concentration on the inner
Impact shows a 20/80 distribution with back foot concentration on the inner edge/ball and front foot concentration on the inner edge/ball to heel.
An important role of pressure flow is to allow the body to rotate into the back hip socket on the backswing (coiling) and into the front hip socket during the downswing. If the weight is not flowing into the correct hip socket at the correct time, the swing becomes unbalanced.