Better? Sure!
Based on the benchmarks, though, that GPU is still going to be about 10-15% slower than the mobile Nvidia GTX 1650 (like you might find in a low- to mid-range gaming laptop), and waaaay slower than the higher end Nvidia mobile GPUs.
It depends on what you need—if you need a portable Mac workstation, and are okay having simming be a secondary function, the Vega 20 will be fine. But I wouldn't suggest anyone buy it primarily for flight sim or gaming purposes.