Check the Max Torque setting between that and the regular VF2. The rating is 75 ft lbs @2100 rpm versus 75 ft lbs @ 1400 rpm for the standard machine.
The standard model with a gearbox will develop 250 ft lb @ 450 rpm.
Using a face mill requires more torque in proportion to its diameter, of course, so if you want to take monster cuts, the 75 ft lbs is not going to permit it.
Don't confuse HP with torque, unless you are talking about machines with exactly the same speed range. Generally speaking, when the Variable Frequency Drive is commanding 60 Hz output to the motor, that is when the motor is running at its nameplate speed, and developing its nameplate horsepower. As the frequency goes higher, the VFD limits the current, otherwise the motor would just keep drawing more and more, and would burn up. The torque goes down, because the current is cut back, but the rpm goes up, so you have constant horsepower output whenever the motor is running at more than 60 hz.
Through parameter settings in the VFD, Haas can permit the motor to draw current 100% higher than standard operational draw on the fully loaded motor, but there is a time limit on this to protect the motor from overheat. However, this is where the "other half" of the missing horsepower comes from. A 20 hp rated machine, has a 10 hp (continuous duty) motor.
The super speed mills will never be workhorse machines, they are for light depth of cut, and high feedrate. You might simply have to change the way you machine to accomodate this fact: use smaller endmills to rough with, moderate depth of cut, but really jack the feedrate up.
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)