The N355 has a base magnification of x3.5
A Drone Pro will most probably be x10 or possibly x15
Both the Pulsar and Drone Pro use the same resolution sensor (752x582)and the Drone Pro uses an 800x600 OLED display compared to the 640x480 OLED in the Pulsar
The Pulsar has digital zoom which, by the time it gets to it's maximum value of x14, is only using the central 188x146 pixels of the sensor. Frankly, the image quality with a 188x146 sensor will be crap
The Drone Pro uses a much larger objective lens to get it's x10 magnification so doesn't need digital zoom.
If you want to shoot foxes no more than 100 yards away then the N355 will probably be fine, but for longer range stuff the Drone Pro will be a much better tool for the job.
Cheers
Bruce