The bayonet is just "as issued" which is preferable in my opinion.
Agree with Steve.
The pictures of the top bayo appears that someone took a grinder to the blade to sharpen it.
That said, not sure if pictures 3 and 4 are of the spine or the bottom of the blade. They are quite blurry.
My greatest fear is that one day I will die and my wife will sell my guns for what I told her I paid for them
"Don't tell me these are investments if you never intend to sell anything" (Quote: Wife)
The lower Japanese bayonet that does not have an edge is a training bayonet. This type is identified in "Bayonets from Janzen's Notebook"