Absynth 3 Presets sound in Absynth 5 very often different? varied?

hey guys, i figured out that Absynth 3 only saves banks... so i checked some presets and loaded them first in Absynth 5 normally and heard slight/more differences, then after importing the previously saved Absynth 3 banks i still hear the differences (most presets i didnt change).

anyone else noticed that? kinda strange sometimes, cause Absynth 3 sounds sometimes much better than Absynth 5 the same patch. Also bad for converting to Absynth 5....