The first is the shape design: the shape design is simple and modern, and the colors are rich and colorful, and each color is bright. The hero's appearance is not so fashionable.
secondly, the price is moderate: Lamy's price is quite moderate, which is affordable for white-collar workers who have just entered the work, and is suitable for more audiences. In addition, not every white-collar worker who has worked for many years is willing to spend a lot of money on pens, so the price of Lamy makes it more common.
third, the quality is good: I bought Lamy and Hero at the same price, and I think it is better than Hero. Hero sometimes has a little crooked nib, and Lamy's nib rarely has problems, which integrates the fine workmanship of German brands.
But you should choose your pens carefully when you buy them. Don't open them after you buy them. Many pens are broken.