Generally speaking, are floor drill presses more powerful than benchtop ones, even if they have the same horsepower motor, specifically 3/4 horse? I'm not talking cheap vs expensive. Say the same brand, Jet for example. I'm only interested in the power aspect between the two. What are your experience's and thoughts?
A 3/4 HP drill press is 3/4 HP regardless of whether it is a floor model or a benchtop. Actually, it might not actually be 3/4Hp, but if you are comparing machines from the same maker, it's probably safe to assume that the power ratings are on the same basis, and 3/4Hp = 3/4Hp.
However, if you are comparing Brand X with Brand Y, it is possible that one or both of the manufacturers are playing numbers games with Hp ratings, so buyer beware. That's a form of liar's poker that law mower manufacturers abused so badly that they are now required to rate their machines in engine displacement rather than Hp. A similar problem was common with stereo equipment.
The other technical differences that might exist between drill press models include throw (throw is the distance that the quill can and roughly equates with the maximum depth of hole that a drill press can create in a single pass - benchtop machines tend to max out at 2" while floor models may have more throw), the number of pulley positions and the selection of pulley ratios. Having a broader selection of ratios, or a larger range of ratios may translate into better torque for the same power rating. In addition, of course, there are differences in the convenience features of the machines - push/pull versus crank mechanisms for raising and lowering the table, the size of the table, whether the table has a fence (you can always make one later), whether there is a worklight and how well it actually illuminates the work area (a worklight on a movable arm is far better than a fixed-position worklight), keyed versus keyless chuck, maximum drill bit shank diameter, etc.
The best way to compare different drill presses is to look at the specifications. Ideally, a manufacturer should provide a simple table comparing the models in his line, but if not, you can easily construct one where you list the various factors and the ratings of each machine you are considering.
A factor that I regret NOT taking into account is how well the chuck grips drill bits, and how easily it is to mount bits. Specifically, it is very hard to center small bits in the chuck of my drill press without standing on my head to look up at the bottom of the chuck.. That's not something you would think about unless you have experience with a drill press on which that is a problem.