How is Chen Style Taijiquan Practical Method different from other taiji styles?

http://workshop.chenzhonghua.org/2010/03/during-form-training-silk-reeling-or-standing-meditation-i-am-really-relaxed-and-try-to-go-deep-into-myself-enjoying-the-feelings/

The above post points out 4 very important characteristics of Chen Style Taijiquan Practical Method.