Jerry,
If any particular model backhoe is run off the 8.3 gpm tractor pump at Xpsi and then off a pto pump with the same flow and psi, it would react identically and have the same capability. You would need to consider the pump available, the size of the BH cylinders and the valving to compare reaction time, in other words compare apples to apples. A BH90 is not a professional backhoe and if time is of the essence then maybe something else may be a better choice. If you "test drive" the BH90 and then perhaps the Woods 9000 if that is a pto model, which I think is a similar offering (I could be wrong), you should do it with identical tractors to make a fair comparison. I would kick the tires rather than take anyones word, afterall it's your money and your decision. One thing to keep in mind is the use of rear hydraulics made available with the BH90 type of setup have the potential to be used with other implements also. I suggest trying before buying.
Happy shopping,
Martin
