Wes, for comparison purposes you have to assume the same picture interval for both the Plotwatcher and the Covert. The Plotwatcher Pro can be set at the following intervals:
1, 2, 3, 5, 10, 20, 30 seconds
1, 3, 5, 10, 20, 30, 60 minutes
For a fair comparison, if the Covert is set at a 5 min interval then the Plotwatcher Pro would be set at a 5 min interval. However, I would never use 5 and 15 minutes intervals because they would do little to nothing for me. I have deer that pass through the two areas I'm watching at short, medium and long distances and they rarely stay in frame for more than a couple of minutes.
With a 5 sec interval a 32GB SDHC card will hold about 3 weeks of images with the Plotwatcher Pro. I check mine about every 6 weeks, so I use a 10 sec interval.
The video files are 1280x720 HD video. I do not know what the image resolutions is. I believe the unit compresses them into a video file. Regardless, a 32GB SDHC card will hold about 6 weeks of video at a 10 sec interval.
Here is a demo of the Plotwatcher software tool. If you use short intervals like 5 sec or 10 sec you will have thousands of images each day. Without a software viewing tool like the one Plotwatcher provides, you are pretty much hosed unless you have a lot of free time to flip through over 4000 images a day.
GameFinder Software with MotionSearch
Day 6 Plotwatcher Pro Review
As noted in the above review, battery life with the Plotwatcher Pro absolutely crushes all other time lapse options available today.