If I had been on my FS bike that would have been hard going up (just getting the right momentum) for me, and moderate if it was flat. That's pretty rocky and similar to trails in New England. It wouldn't have hurt, though, because of the suspension.
Mountain biking isn't anything like road biking! Always having to remember "butt up and off the back" while descending and "boobs to the tube" while climbing got overwhelming. I am a timid descender to begin with, and when someone tells me not to brake going down a rocky hill, well, that was kind of counter-intuitive to me. I did a couple of descents well, that really surprised me, but it took a lot out of me. One of my issues was I tried to avoid the rocks and roots if there were just a moderate amount, and that wasn't always the best "line." And when people were screaming "choose your line," I didn't know what they meant. After I learned, it meant little to me, because to me, the best line was the one that avoided obstacles. Plus, how do you know? No one could really explain that to me. So, my brain kind of always felt like it was going to explode with all of these rules.
I'm kind of the same with road cycling, but it all seems a bit more intuitive to me. I just want to ride, and it's harder to do that mountain biking.