The Hilux has a solid front axle while the Tacoma has a wishbone suspension, IIRC. The latter while good for high speed travel on road and sand, lacks performance in wilderness and rocky terrain. It is the reason the Hilux outperforms the HUMVEE in Afghanistan and Pakistan. As well the Tacoma does not have a diesel option (one of the main reasons it survived submersion).

On another note the Suzuki Samurai is another off-road vehicle that is virtually indestructible.