You can check and compare Jenius' reviews for both Arcadia's YF-19 and Bandai's VF-19Adv on Anymoon.com.
As for the DX YF-19 displayed on last Tamashii show, everything were all 'for display' purposes and that's basing on some of the item cards displayed beside the product. They're still no 'official' release announcement for all that were displayed there except for those that already been 'announced'. Esp now that they're probably going to concentrate first on the upcoming Delta DX figures. Any maybe somewhere in between those Delta and Hi-Metal R releases, they will finally announce the DX YF-19. Let's hope for the best and success of all the line so that everything they shown on that event including the 1/35 VF-1J will get produced.