It doesn’t taste the same. The lactase breaks the less sweet lactose into glucose and galactose, which are about twice as sweet as lactose (all are less sweet than table sugar.)

Also lactose free milk is typically ultra pasteurized, which gives it the longer shelf life, but ultra pasteurization does impact taste. It gives it a “cooked” flavor.

I’ve found lasers to work better for infrequent printing because toner doesn’t dry out and clog things like ink does. Does the Ecotank have that issue if it’s months between prints?