I'm quite interested in seeing a comparison between the 6600u and the 5700u. If what I've read is true that the 3 WGP / 6 CU version of the iGPU in Rembrandt is roughly comparable to the 8CU Vega in Lucienne and Cezanne, then the comparison is going to come down to CPU performance, which doesn't differ greatly from Cezanne, save for MT workloads. Will the two extra cores and four extra threads make for a notably different system? The 5700u is often available for very good prices. That's going to put a hard ceiling on 6600u systems.