Seiya's HR: 105.7 mph exit velocity, 26 degree launch angle, HR in 1/30 parks (yay Wrigley), .950 xBA, 389 feet
Dansby's flyout: 105.4 mph exit velocity, 31 degree launch angle, .850 xBA, 385 feet
So basically 0.3 mph less velocity hit 5 degrees higher caused the ball to go 4 less feet