My wife and I have driven several thousand miles in East Africa in both 78-Series Land Cruiser Troopies and 110 Land Rovers. Each has its strengths and weaknesses. But our most recent trip comprised 3,500 miles in a 110 with a 300 Tdi, and a suspension set up with heavy duty TJM springs and Koni Raid shocks. The combination was superb - excellent mileage from the 300 Tdi, and a comfortable, well-controlled ride over any surface.
Personally I'd go nowhere near the TD5 and its drive-by-wire throttle, computer, etc., at least for Africa.
If you decide on a Land Cruiser, an excellent combination is a 78-Series Troopie with the 1HZ diesel. Loads of cargo room, unbreakable driveline, but a stiffer ride than the 110.
Good luck with your search.