The difference between Ge kiln and Ru kiln

I think the difference between them is:

1, tire quality: Ruyao tire quality is loose and Geyao tire quality is fine.

2. Opening: Ru kiln opening is an ice crack, and Ge kiln opening is a crab claw pattern.

3. Zhi Ding mark on the bottom of the utensil: There is an obvious Zhi Ding mark on the bottom of Ru kiln, but not on the bottom of Ge kiln.

4. Glaze color: Ru kiln is dominated by azure, and Ge kiln is dominated by powder.

5. Glaze: Ru kiln has "pear skin" pattern, while Ge kiln has no "pear skin" pattern.