Before my Lawnbott, I owned a robomower. I pulled, saved and recycled the robomower pegs when I moved from my old house and got the Lawnbott.
I have found that the robomower pegs not only hold the wire in the ground much better, but they break less often. The robomower peg even tightens up the perimeter wire nicely as you hammer it in the last little bit. The only time that I've ever had one break was when it hit a root or a rock
I find that the lawnbott stakes break about 30% of the time that you put them in or remove them. Sometime they hammer all of the way into the ground and then the last tap with the rubber mallet breaks the head off. Very frustrating.
I'd call the robomower peg a Porsche and the lawnbott peg a pinto.
Lawnbott pegs: 200 for $45, which is $.23 per peg
Robomower pegs: 50 for $30, which is $.50 per peg ($.60)
My opinion would be that you are better off paying a little more for a much better peg.