The M1 Ultra is by a very wide margin the bigger of the two. According to Tom's Hardware [1], top-of-the-line Epycs have 39.54 billion transistors. That is abou

The M1 Ultra is by a very wide margin the bigger of the two. According to Tom's Hardware [1], top-of-the-line Epycs have 39.54 billion transistors. That is about a third of the 117 billion in the M1 Ultra. Apple builds bigger than anyone else, thanks largely to their access to TSMC's best process. The M1 Ultra is a workstation part. It goes in machines that start at $4,000. The competition is Xeons, Epycs, and Threadrippers.