"Recoil" is complex.
Strictly speaking, recoil is based on equal and opposite reaction. So TOTAL recoil is simply (mass of ejecta X velocity of ejecta) = (mass of gun X recoil velocity of gun.)
"Ejecta" is everything that comes out the muzzle -- both bullet and propellant gas. And the velocity issue is complex -- some gas will move faster than the bullet (but soon slow down in the atmosphere.)
TECHNICALLY, you could expect a revolver to have LESS "recoil" since some of the gasses are expelled to the side.
However, there are other factors -- one of them being the TIME in which recoil is expressed. A pistol like the M1911 spreads recoil out over time -- because the frame and slide do not recoil at the same rate.
Another point is the lever arm (how far above the point of rotation the barrel is.) A gun with the barrel lying lower in the hand will seem to recoil a bit less, while one with the barrel quite a bit above the hand will tend to rotate and "kick back" more.
By and large, when it comes to felt recoil, an M1911 design will have less felt recoil than a revolver of equal weight when firing the .45 ACP cartridge.