To TS
Re efficiency and maintenance
Utility-wise, the Ranga will be efficient since it got larger bed. On fuel, that depends on your load. Unladed and normal driving the 2.2 will be efficient. Give them something to haul then 2.2 will be more stressed while the 3.2 will struggle less.
Maintenance wise, Strada since its almost a century-old vehicle all kinks have now remedies and aftermarket parts are abundant.
Truth is, they all have turboe lag..be it the 3.2 4M40 or 3.2 Puma. Going with sprint booster could help, but still its like fooling the the potentiometer to respond earlier.. Attached is the detailed explanation for sprint booster and similar products.
Sprint Booster ? Is It Worth It? | outbackjoe