gabapentin vs. neurontin

Someone told me yesterday that neurontin works for her and gabapentin didn’t. I thought Gab. was just the generic of neurontin, and they are both the same, but she said that gab. didn’t help her a bit, and her dr. put her on neu. and it’s helping her nerve pain. anyone else heard of this? I’m not getting much relief from gabapentin, yet. I’m only up to 1600 mg a day, tho’. Thanks