I'm currently on FH SW swing door and plan long term to switch to drop down. Have accumulated most of the parts to let that happen.
Most tire carriers are specific to swing doors. Britpart has one that works with both.
A friend of mine runs a land rover / range rover specialty repair shop. Based on his experience, they are capable of stopping anywhere, anytime, at any cost.
I don't know about the brakes, only their unreliability.