What's the difference between confession and diligent memorial tablet?

"Yan Bei" This is Yan Zhenqing's tombstone for his grandfather Yan, which was inscribed by Yan Zhenqing. Engraved in the 14th year of Tang Dali (779). It was unearthed in 1922 and is now in Xi 'an Forest of Steles, Shaanxi Province. This is one of Yan's late masterpieces. This tablet was written by him at the age of 70, and it is indeed more complete than his previous books. The brushwork is strong and refreshing, and the structure seems light, but the opening stretch is just right, strange and clever, steep and smooth. Take more pens at the turning point and see the bones and muscles. Fully form a rich, simple and magnificent Yan Kai style. Because this section has been buried underground for a long time, the damage is small and the handwriting is clear, which is a monument to Yan. Confessions of Ink is Yan Zhenqing's masterpiece in his later years. Although this monument and the diligent monument were both made in his later years, their styles are quite different. This tablet is round with a stroke of a pen, and it is even suspected of being too fat. Although it is a masterpiece, some people even say that learning Yan Shu can't help but draw spirit and outlook from Confession Ink.