The upcoming late 2019 model will be 4 percent thinner (23.5 mm vs. 24.5 mm) with 28 percent larger heat pipes than the 2018 model. Meanwhile, the Ryzen 5 3550H and Ryzen 7 3750H should offer a performance level similar to the Core i5-9300H but for hopefully much less.
https://www.notebookcheck.net/AMD-Ryzen-CPU-options-coming-to-the-HP-Pavilion-Gaming-laptop-series-for-the-first-time-ever.430523.0.html