What the four inches do
A modest gain, and worth being honest about.
A queen gives you 600 square inches to sleep on where a standard gives 520, so you gain about 15 percent. That is enough to notice when you turn onto your other side and enough to keep most people off the edge, and it is not enough to fix a serious traveller. If you routinely wake with your head on the mattress, the size that solves it is the king at 720 square inches.
The weight goes up gently rather than sharply, which is the part in the queen's favour. A queen buckwheat is 13 pounds against 10 for a standard, and a queen in wool is 3.4 pounds against 2.8. You are not taking on a heavy pillow to get a slightly bigger one.
600square inches, against 520 in a standard
15%more surface under your head