We had a STS9750 trialled for a day against a TR98 and TX66 all with 36 foot fronts in a 3-4 T_Ha wheat crop, and the sts absolutely killed the other 2 during the heat of the day, but by 10pm that night, the tx was beating the sts because of the tough conditions, and to do the same job, the sts was using 450 odd HP, and really working, whereas the tx is only 290hp i think, and it just chugged along easily! hope that helps!