Gundam symbolizes love and freedom throughout the series.
If you look at SEED, this unofficial work brings it to a new height after collecting the essence of Gundam series, and explains the conflict between love and freedom and human nature very well.
Gundam, as the most successful work of Japanese mecha commercial animation, belongs to a different performance style from Transformers. The expression of human nature in Europe and America may be influenced by culture, and there will be differences in acceptance or sensitivity in China. So we can't say which of the two works is better or worse, but the styles are different. They are all classic works.
The quality of Transformers' later works is not high, which may be due to the higher visual requirements of European and American cultures and the younger audience than Japanese animation. Of course, after the movie version of Transformers was released, it was reborn and more perfect.