In reply to douwe:
Very different shoes. I've had both, didn't like either of them much personally.
My problem with the velcros was that they were too soft for my heavy, clumpy-footed climbing style and quickly broke down and lost all support. (But how many bouldering world cup rounds has Kilian Fischhuber won wearing them? Lots)
The Laces otoh were super durable and supportive, and I suspect would have been great if they hadn't been a little too wide for my foot. I prefer Miura Laces which are noticeably narrower. The Katana laces served me well and retained decent performance for a long time as training and multipitch shoes though.
I had both Katana variants, and Miura Laces, three full euro sizes down from street shoe size (42 vs 45)