Better from what point of view, Reliability? Support? Programming?
They have both been around along time and the support is generally the same, however you should check in the country you intend to use it in to see what support is offered both technical and Parts.
Also important is if the original Machine tool builder is still around or already has a strong presence.
You can have the best control in the world, but if the machine construction is lousy, the control won't make up for it.
If you buy used, insist on getting all the documentation.