I think I have an explanation as to why your Range Rover went easily over the ‘gator, while the F-350 bounced.
The rover is designed to carry maybe 1000 lbs in relative comfort, nice cushy ride with off-road abilities.
The F-350 is designed to carry 2 1/2+ tons of load. The suspension is, shall we say, “just a tad” stiffer. Had your 350 been loaded, I doubt you would have had such a radical departure from your lane.
In point of engineering fact, the Rangie has several inches of axle travel before contacting the rubber axle stops whereas the F350 has only 1/3 the travel.
The Rangie tires have half the air pressure of the F350 tires, so even though both tires have similar tire depth, the Rangie tire compresses rather more easily.
The F350 gator was hit at about a 50 degree angle, the Rangie gator was a near perpendicular strike.
Summation: Don’t drive lil’ rice burners in gator country.
;-)