The Ryzen 5 3550U may be another mobile Ryzen 3000 series APU, but not all is as it seems. A recent Geekbench listing shows that the processor is capable of even outscoring the Ryzen 7 3750H in multicore tasks. However, it appears that AMD is still incapable of narrowing the gap to Intel's Whiskey Lake generation, putting somewhat of a dampener on the Ryzen 5 3550U.
https://www.notebookcheck.net/The-Ryzen-5-3550U-outscores-the-Ryzen-7-3700U-and-Ryzen-7-3750H-in-Geekbench-but-lives-in-Intel-s-shadow.430315.0.html