Well depends as to what tyre. What we have here are P tyres for passenger vehicles Which any of the land rovers will fall into. Which are basically a load rage B 2pyl,2ply tyre. Then you have LT tyres which are a loaded range from C,D,E range tyre, with these they have more plys in the construction and are a stronger tyre (heavier load rating) which require slightly more are for proper inflation, and even tyre wear.
A P rated tyre will require less air and be a smother riding tyre, with less load and towing capacity.
A C rated tyre will require more air and have a more firmer ride, But will have a higher load and towing rating capicity
Both are made in the same size and tread patterns in most cases, But with slightly different.info in the box on the tyre. That is why I have always said use the info box on the tyre. I manfacture of the vehicle has no idea what tyre you are using and are just a guide line to use, other than if you got factory originals on