Block (How so I make it different from others)

How do I make a block unidentical from another? Do I register a whole new block and extend it to the block?

 

I don't understand what you're meaning.

 

How do I make a block unidentical from another.

 

As in like creating 2 chest blocks and if you interact with one, you get the chest inventory. But if you interact with the other one, something else will happen.

 

I think you can do by register the block an other one and change event

 

What do you mean by "change event"

 

When player tap an other chest for example, broadcast message "Example" to the player

 

And what will that do?

 

Broadcast message or something else

 

You can add an custom NBT tag and then you can check if your block has the nbt, you have addet.