DTA380 should be binary compatible with DDA320's dingux.
In theory, but it really depends on the programs themselves. If a program has any hardcoded pathes to file locations, or tries to access hardware directly, there might be incompatibilities between the two platforms and the binary might segfault. There can be also differences between the system libs in Dingux's rootfs and the one present on A380. Moreover, A380 has a different screen resolution and most of the dingux programs were designed to run in 320x240, so they might behave highly unstable in a different screen size. There are probably more examples of issues with running dingux binariees on a380, but the ones I listed should give an idea why DTA380 doesn't play Dingux apps perfectly.