Remember...most Dealership Service Advisors get a piece of any upsell they make. Even at the one I go to (who knows better than to BS me), I've watched some SAs come into the waiting room and try to sell BS "services and repairs"...mostly to women and guys that don't even know how to change a tire or check their oil. Your tires shown are good.
The OEM tires are identical to what you get at retail outlets. Manufacturers ger a huge discount to put tires on their cars - free advertising for the tire companies.
If the specs are the same, yes. However, there are often different-spec versions for the same tire model. For example, my Dunlop Enasave 01 A/S has both 91S (OEM and aftermarket, 51 psi, 340 treadwear) and 89S (aftermarket only, 44 psi, 540 treadwear) versions. In this case, the OEM version is of higher quality (with a higher load index and maximum cold pressure) and significantly more expensive than the aftermarket-only version.
Sometimes, the car manufacturer gets a 'shaved' tire from the tire company. It has a shallower starting tread gauge than aftermarket, and lets the car company test the car with an effectively more worn tire for fuel economy.
