“The new SoC consists of 114 billion transistors, the most ever in a personal computer chip.”
M1 Ultra is two M1 Max dies glued together with an interconnect Apple calls UltraFusion. Apple claims it beats “the highest-end PC GPU available” and never names which GPU. Every comparison is against “the fastest available” chip, never a model number. The memory is part of the package, so the 128GB you don’t buy on day one you never get.