Hi Guys,
They are definitely cleats - have seen sore refs wearing them and they come highly recommended for their comfort.....but not sure about playing in.
They do approximate blades in essence - suppose major difference being the length and sharpness of the studs/blades...and major difference to normal blades is that there is a central "circle" under the sole of the foot...supposedly aiding grip. If it helps, they are made by Asics in this instance
They are perfectly legal and there is no reason to make a player change them, unless they have sharp or dangerous edges.