SS appears to be the best of both worlds. On the one hand, it is AI-based and should provide high quality results similar to DLSS, but on the other hand, the tech aims to become completely open source by the second or third iteration.
https://www.notebookcheck.net/More-details-on-Intel-s-AI-based-Xe-SuperSampling-tech-launching-with-the-ARC-GPUs-revealed-by-principal-engineer.556659.0.html