write with release semantic cannot be reordered with any other writes, dependent or not.

Relaxed atomic writes can be reordered in any way.

> write with release semantic cannot be reordered with any other writes, dependent or not.

To quibble a little bit: later program-order writes CAN be reordered before release writes. But earlier program-order writes may not be reordered after release writes.

> Relaxed atomic writes can be reordered in any way.

To quibble a little bit: they can't be reordered with other operations on the same variable.