Most of these tools look similar, but watch out and double check if the one you like to buy is any good. If you do not know or cannot have a close enough look at it, you can probably tell by the price if there is a chance that it can be acceptable quality. I would think a useful die will be at least 20-30$ and the plier would add probably at least another 20$. If my guess is right the minimum expected price will most likely start at 40-50$ for acceptable quality.
With mine the overall build quality and especially the die is really poor and therefore, as I said, a waste of money (I think it was around 30€).
A Knipex offered from Amazon would only be 75€ (or even 70€), so I would not think twice and go for the real tool.
I do not know your Greenlee and the price for it, but at least it looks like a better/good one to me.