I've looked at these pictures for a very long time. I didn't respond at first because it wasn't very obvious to me, but after a considerable amount of time and comparing with other photos, I think this is more than likely a shallow fuller LanCay.
I do have some concerns about the standard fuller LanCay you picture. The blade appears to me to be a very bad factory second. Compare the back point of the cutting edge on the two bayonets you show. The one on the standard fuller is non-existant. Also, look at the area of the blade where the ricasso meets the cross guard. The shallow fuller shows what both of these areas should look like.
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