The site says the Iris Plus Graphics G7 integrated graphics beat AMD's Radeon RX Vega 10 integrated graphics by up to 23 percent in synthetic benchmarks. In real-life gaming tests the difference shrinks to a roughly on-par level, but NotebookCheck didn't really test a lot of games so further testing will be required.
Overall it appears Intel is indeed serious about upping its game in the graphics scene and we can't wait to see what Xe (Gen12) delivers.