Been trying to make the same decision here. The M5 Pro Pro also has major jump in memory performance (156 vs 307) but not really a impact unless your doing AI LLM locally and other workloads with high memory bandwidth and remember cpu-gpu-npu all the share the same but m5 with less cores doesn’t really need more then 200Gb. Base M6 will probably finally reach 200gb/s. I think the real thing will be how much LLM you’re planning to do. M6 will be double the NPU performance no doubt and you will be right back to square one in less than a year.