don't think of Ford and LR as one company, with one line up of vehicles.
they are seperate brands, each trying to put vehicles onto the market to sell as many as possible.
Using common parts, drivetrains and bodies, between brands reduces Fords market coverage, because buyers will only have a choice of one vehicle with 2 bodies, and are more likely to by from a non-ford brand.
You should also be aware that ford and LR appeal to different types of buyer with different ideas of what a "SUV" should be.
Nobody who buys a range-rover wants to think it's got the same bits underneath as a ford.
and people who buy a ford don't want to spend money on a vehicle for road use that is as good off-road as a land-rover.
Land-rover have always prided themselves on the off-road ability of all their vehicles. and for whatever reason this is what the public wants to buy. If they start selling vehicles that aren't up to that standard then sales will drop quickly.
what's an R7?