, I would never test anything thermally on foam unless you're trying to thermally isolate it from the table. Foam is a thermal insulator (what you have there looks to be on par with air conditioning foam actually), you'd be even better off just putting a bolt + nut with a few mm length on the corners and just having it empty underneath the board ; it'd also represent a case scenario better.
Also if it's a low priced "UD" or Gaming X non-Aorus board I wouldn't expect that much from it. If it performs at least at a midrange level it is already better than expected. Even feature-wise they aren't really differentiated from other brands' boards other than the Dual BIOS ; the brown tinged PCB suggesting possibly low thickness isn't going to be compelling to many people as well.
For Aorus boards I would think the audio section (MASTER has the high precision clock source , that I know) with WIMA caps, thermal headers, thermal sensors, post code on Master/Ultra, as well as dual BIOS features attract more performance-oriented buyers while RGB + cleaner design (i.e. vs ASUS STRIX grafitti) attracts the aesthetic minded ones. I'm unsure on how much of a price difference there will be between the Ultra,Pro , and Elite. However, the main difference I see is the post code on the Ultra and the heatpipe retained on the Pro but not on the Elite.
Chopping off "Gaming" in favor of names such as Elite/Pro/Ultra/Master should also net some sales , unless buyers are outright searching for "gaming" in the motherboard name. I believe that it is similar to how ROG is abbreviated for Republic of Gamers. We see a similar evolution in MSI's lineup where "MEG" supposedly is abbreviated enthusiast gaming and MPG is performance gaming whatever those terms are supposed to mean.
If you trust in the engineers' ability to select & size inductors, the very fact that the new mid-end Aorus boards use R30 (300nH) chokes versus R40 (400nH) ones suggests there is a lower ripple output versus previous midrange Z370. Boards such as the MSI Z370 M5 were using R40 , MSI's Z370 Pro Carbon was using R42. The Z370 Taichi + K6 were using R22 Cooper Bussman
60A inductors ; the Z370 Gaming 7 from Gigabyte had 150nH inductors from Cooper Bussman's Coiltronics (http://www1.cooperbussmann.com/pdf/7...9b2be9f2e4.pdf
I believe anyone that ever considered Gigabyte a choice for motherboards should be stoked as to the new state of the Aorus boards , it seems every Z390 Aorus board has capability to be a respectable VRM.
Also here's a Geekbench on the Aorus MASTER with i9-9900k : 6200+ single core https://browser.geekbench.com/v4/cpu/compare/9980316?baseline=9931617
Asrock Z390 Phantom Gaming 9 preview: https://news.xfastest.com/asrock/54351/asrock-z390-phantom-gaming-9-z390-taichi/