Summarize the last concluding part. The ease of writing is better with the 849 series. Because the 849 series is lighter. The 849 series is easier to grip. Because the 849 series is less slippery. However, the 849 series may hit the clip. Ink quality is about the same. Ecridor is better for writing. Because Ecridor is heavier. The visibility of the pen tip does not change much. Design depends on your taste. Ecridor has better knock feeling. Because there is less vibration when knocking. If you value practicality, the 849 series is recommended. Ecridor is recommended if you value luxury.