Speaking from experience I have both, and yes the finbore is no question a better auger. This is due to the difference in blades. Swede bore blades shave, whereas finbore blades core the ice.
My finbore also came with the off-center handle which spreads the cranking power to both arms. Normally I drill three holes when fishing in a hub, and every time I move the hub it can get exhausting when using the Swede bore. No problem at all with the finbore, even when the ice gets over 18" thick.