Since the Nether update, I noticed that while I was playing survival on Bedrock, there were a lot more ghasts attacking me in biomes where they could spawn in than what I was used to on Java (before 1.16). Then I tested it on Java 1.16, and there was a clear difference. It isn't rare to see two ghasts in close proximity on Bedrock, while on Java such a sight is more uncommon.

PS: This is just my personal opinion, but I much preferred the Bedrock spawn rates, as they made the Nether a lot more challenging, instead of the attacks just being a sporadic mosquito bite. It was more exciting, so I hope Mojang will consider increasing the Java spawn rates, and not lowering the Bedrock ones. (Though sometimes it felt as though as soon as I killed one of them, another would spawn to get me. Could've been me being tired too.)