The best way to determine the differences and similarities is to read the descriptions and comparison charts on momprice Web site about these products. I can say I prefer the ported sub for various reasons. I suggest one read a review about these subs posted by audioholics for a clear understanding of the advantages and disadvantages of ported and non ported monolith subs. That article helped me decide which was best to meet my purposes. You can't really go wrong with either. I will say that with the ported you get the benefits of both because you can plug the port to simulate the sound ofa sealed sub. Monolith subs produces outstanding clear, clean sound.
One is ported, the other is sealed. You should be able to google the use of each, but the general opinion is to use a ported sub for home theatre applications, and a sealed sub for audio quality where bass definition needs to be highest.
The image in the gallery shows a back panel that's completely blank with no indication of what the knobs and LEDs do/mean. Was this a photo of a prototype, and do the shipping subs actually have their knobs and inputs/outputs labeled?