Both of them can meet the needs of practicing calligraphy, depending on your own situation.
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The separation between practice and creation is put forward by prose and official monuments, which really deserves our attention: why can't the monuments we studied in the past become elements in creation? This is a big problem, and many graduates of the Academy of Fine Arts have not solved it. But the solution is not complicated. Just write quickly when practicing, don't draw the font slowly. But why do so many people fall into this trap? First of all, we are too eager for images. We always think that writing should be like writing. In fact, the key is to see if we can grasp the trajectory of the ancients. The ancient people's pen trajectory is three-dimensional, which is not easy to grasp and needs constant speculation, practice, verification and so on. Nowadays, people prefer to do manual work rather than use their brains. They can't grasp the brushwork and work as photocopiers one by one. Secondly, people who pay too much attention to visual effects and ignore physical feelings, especially those who have been trained in western art, can't wait to find out the exact coordinates of each stroke. The mistakes of modern calligraphy mostly lie in catering to the western habit of paying attention to visual impact and ignoring one's own physical and mental feelings. There are also some wild fox Zen, which advocates mind and doodles. I beg to differ. It's wonderful to think too high. Let's get the feeling of the body right first and then talk about the rest!