Factory pipes, same make and model, for me would be Peterson bent brandy B11's, one Shannon and one Killarney; Stanwell bulldog shape 32, one Silke Brune and one smooth finish; and though not the same model, I have four unfinished Savinellis, a zulu 404, a billiard, a billiard panel stright saddle stem and a bent Dublin. I generally enjoy a well-made factory pipe and have a number, probably too many, including a number of French pipes which are excellent -- Chacom, BC, Vuillard, Ropp, Genod. One advantage with factory pipes is that you have a larger selection of lighter weight pipes, since artisans tend to want to make bigger heavier pipes that they feel they can sell at a higher price point. fishnbanjo has many superb smaller artisanal pipes to disprove this point, but I couldn't afford those!
Really interesting thread topic!