I have the Durafly P47 and my friend has the Parkzone P47. He has installed the optional retracts and flaps so they are now very close specs. Build wise they are fairly even, though the Parkzone probably has the edge but I like the look of the Durafly slightly better. The four bladed prop looks good on the Durafly but has the negative of being less efficient and also worse with belly landing; I've changed to a two bladed wooden prop.
The retracts on the Durafly are roughly comparable however the prebent struts are good on the Parkzone as they have a bit of a spring in the middle which gives it some flex, where my struts bent on grass landings. I have got the PZ struts to put on my Durafly but unfortunately broke two screws when trying to get the other struts out.
On take off the Durafly has a shocking torque steer, probably due to the larger prop. Have to be very careful to accelerate slowly. In flight they fly fairly similar however the lower kv motor on the Durafly meant that it flies slower at WOT even though it has a bigger prop (other people haven't found this the case though), was even worse on the 4 bladed prop. I find that I wish it would go about 20% faster so that it would be still scale but powerful enough to pull out of manevoures. The Durafly pulls 32 amps on the four bladed prop at WOT, though only 22 amps with the two bladed. I find that I am flying the Durafly at WOT 90% of the time, as such only getting 7 minute flights on a 3S 2200mah.
The Durafly has a 35 amp ESC and the Parkzone only a 30 amp ESC with inbuilt 3 amp BEC. I think with the amount of extras they should have an external BEC and I have installed one on mine; just wasn't comfortable with all those servos, lights, retracts operating from the inbuilt BEC.
I have a 910kv 3536 NTM Prop drive motor on the way which I'm going to replace the standard motor with. Hopefully that will give it a bit more punch.
The Durafly is about $185 delivered in Australia and the Parkzone P47 about $350 with the retracts and flaps. The Parkzone does have a full range of spare parts where the Durafly only has the prop available, though I think they are going to stock the spare parts soon.
Hope that helps.
Cheers
Brett