I guess you like the cross on the left for the same reasons I don't Dehno, and that is one of the great things about pictures
For me, I don't like ornamental crosses as they disguise what the real cross is all about. Whether you have any kind of religious faith or not, the cross was a horrendous means of giving someone the death sentence, utilising a very slow and painful death. So for me the cross is an ugly thing, a barbaric means of torture far worse than hanging, behading, gas chambers and so on. So the tombstone depicting an ornamental, almost 'beautiful' notion of the cross does not symbolise the suffering and death of Jesus in the way it is supposed to.
I guess that's why I felt the rough-hewn stone cross with a simple depiction of Jesus on the cross speaks more to me. It also connects better with the look of sorrow and grief on the face of the two Marys and so brings a sort of completeness to the image that I don't feel is added to by the other cross at the side.
Only my opinion of course, and as a Christian, my viewpoint is naturally affected by that element of things.
Cheers,
Rob