Summary:
Powder snow takes longer to mine than in Java Edition.

Steps to Reproduce:

1. Place powder snow
2. Switch to Survival mode
3. Mine the powder snow
4. Repeat these steps in Java Edition and compare results

Observed Results:
Powder snow takes longer to mine in Bedrock.

Expected Results:
Powder snow should take as long as it does in Java Edition to mine.

Videos:
Bedrock:
Minecraft 2021-01-02 11-30-38.mp4
Java:
Minecraft 20w51a - Singleplayer 2021-01-02 10-42-07.mp4