Looking at the datasheets, the zero / offset error vs temperature is very close between the two (looming physical limits probably) at typical 50nV/°C vs 35nV/°C for the AD4030.
More interesting maybe the gain error vs temperature: typical 0.5ppm/°C (1ppm max) with the TI part vs. 0.025 ppm/°C for AD.
Haven't looked further yet, but for DC precision that's quite a difference in temperature sensitivity there?