.There are substantial differences between the 3 new,hi-speed farm tractors that still exist as working businesses.The Unimog does not have central-drive which is on all Trantors & Fastracs,does not have a hitch or linkage suspension and has a much bigger rear load platform than the others.Unimog`s have a 3-seater cabin and can take 6-more people on its platform,Fastrac has one occasional seat and Trantor has in-cab seats for 3 and a platform for 4 persons. The Unimog & the Trantor are similar in weight at between 3-4tonnes but the Fastrac is very much heavier due to its ploughing -focused design-reasoning which is also present in the Unimog but positively something the Trantor EXCLUDES in its design perspective..The fuel-consumption of Unimog & Trantor is similar and much lower than the ploughing-focused Fastrac.The Unimog is popular for spraying because of its large rear platform but it is the Trantor that concerns itself with ALL transport & low-draught duties and so is designed for work in zero-tillage