From the above two sentences, it is not difficult to see the difference in style. Meng ci is free and easy, elegant, showing the characteristics of casualness; Tian Zi is rigorous and resolute, showing a delicate style. If the European word is taken as the standard, then compare it with Jiuchenggong:
It is not difficult to find that Tian Zi is closer to European style.
Meng's strokes are thicker and his strokes are thinner, which is also the characteristic of Tian brothers. However, compared with Ou, Meng's strokes are not as fine as Ou's. Although sometimes fat strokes can give people a full sense of beauty, the finer the strokes in calligraphy, the more difficult it is to grasp accurately, which may be one of the reasons why Tian said that he would write Ou's words slightly fat!
If their calligraphy is good or bad, it is that different people have different opinions. I like both their calligraphy, and each has its own merits. I hope my answer can be encouraged by you.