I've got genius 5.5 from '06 (ratchet), and previous to that some velcro'd Adidas Tri shoes. The velcro was more forgiving and allowed more movement at the top of my foot and the ratchet is more stable and keeps my foot in position with less pressure.
In the end it's down to comfort and use, will you be training and going on long rides, or commuting or both?
I've got genius 5.5 from '06 (ratchet), and previous to that some velcro'd Adidas Tri shoes. The velcro was more forgiving and allowed more movement at the top of my foot and the ratchet is more stable and keeps my foot in position with less pressure.
In the end it's down to comfort and use, will you be training and going on long rides, or commuting or both?