Not the same at all. The private Facebook group, in which mostly I post, currently has only 1200 members, while the Feathered Friends Hive "community" currently has 3549 members.
The less than 10% leave a comment is certainly true on the Hive blockchain, but not in the proper Facebook groups.
Much higher percentage of people are commenting on Facebook. Some of them even write private messages too.
If you have the same experience in the Hive blockchain "communities" and in the Facebook groups, then probably you are in the wrong Facebook group(s). Especially with unique content, which stand out on its own in the proper Facebook groups.
😅 I close my Facebook account in 2020, I don't miss it at all
With the proper approach and usage, Facebook can be very useful in certain cases. But of course everyone is different. There are different platforms. And everyone find, which works properly/best for him/her.