We went through this process several years ago and after much researching, test driving, and asking questions here and other rv forums, we narrowed our search to the GMC Terrain and the Honda CRV....both fully loaded with all options.
As mentioned the Terrain is essentially the copy of the Equinox except for the exterior body style...plus the Terrain has more features that are standard whereas they are options on the Equinox.
We found, after several test drives, the Terrain was quieter, smoother riding, better mpg, more power, had more available options and the seats were more comfortable....plus a V6 was available (which we didn't want)...not so on the CRV.
Fully loaded, the Terrain was a little over $1000 more than the CRV but we found that the positive differences was worth that amount.
I was initially concerned about the reliability the GM product and knew the Honda had a much higher rating in this category. However, we decided on the Terrain and now after 6 years and 90,000 miles, the car has been absolutely problem free. I have only done oil/filter changes and have replaced the tires and battery...... that's it, nothing else.
So.... as you can tell, I'm very satisfied with our Terrain and highly recommend it.