Up in the air!
All in all, both are great products. But like everything else in life, there are flaws to both products. You can find video where each are mounted on a boat and they are tested the same way. You'll see that there is good from both.
The powerpole will stop the boat faster, its stronger, hydraulic beats electric gears in this contest. Its not exposed in the air when in use like the talon is.
The Talon wins when it comes to the electronics, as your boat rises up and down in the water, the stake of the talon will dig deeper when needed, ensuring an anchor in nasty winds. You always hear about powerpoles being ripped off because people take off with them still down in the ground, the talon will alert you in this situation.
They are pretty much priced the same, still seeing alot of powerpoles but have seen more and more talons as the weeks go by. Again, both are great, just a matter of what you can live with.