Compare these two equatorial Mounts.?

Both of these mounts should be adequate for your application, which limits your exposures to 2 minutes or less. An optical tube weighing 30.8 pounds is fairly large as telescopes go. If it's a longer focal length, say f8 or more, you might find these mounts aren't stable enough.

The rated weight capability of a mount can vary quite a bit. Some manufacturers tend to overrate their equipment, others underrate it. As a general rule of thumb, visual applications are less demanding than imaging & the longer the focal length of your telescope, the more weight capability is needed. Don't forget to add in the weight of any eyepieces, finderscopes, cameras, etc.

I have heard good things about the CG-5, but I have no personal experience. Given the much lower price, I can't see not trying it. I expect you could return it if really dissatisfied.