greetings all ,
my personal opinion based on driving experience of Prado GX (manual) TX (Auto )& TZ (Auto).
both TX and GX were 2TR VVTI 4cylinder engines and TZ is 3.2 cc 6 cylinder. To be honest ,when compared to TX and GX ,TZ is heavenly in every aspect smooth driving ,,balloon like suspension and what not , yes obviously fuel consumption is little bit lower than both TX and GX coz TZ is 6 cylinder so my personal recommendation is TZ ,,TZ and TZ.
one last thing if someone is seriously concern about fuel consumption shall not opt for any Prado in that case coz Prado is a luxury vehicle with luxury fuel consumption. It does not understand the meaning of economical driving .harder you hit the gas harder it hits your pocket
just my view ..