I have an Aries and have in the past pondered the same question, but I have a good friend with a TNT who has tried both, and have benefitted from his experience.
The acrylic platter and outer ring combo yield a more neutral sound than the cork/lead/acrylic platter, and the bearing on the former is quieter. The older platter, however, is warmer and some may prefer its sound in certain systems.
In short, the acrylic platter / outer ring combo are not necessarily better, just different.