you will see significant difference in K1 and K2 first sem for big B vs small B. My daughter is also Oct small B, K1 and K2 teachers told me her 小手肌相對較弱. However, not much difference with other kids from K2 second sem, so you don't have to worry.
She is now in P1, she writes very fast. she could finish a 10pp exam in 45 mins, still had time to check tim