Unless I'm misunderstanding (which I could well be - this isn't my field!) those use several narrow-band coloured lasers and combine the output. This article is a single wide-band semiconductor.
Actually supercontinuum lasers are not a recombination of different (incoherent) lasers but rather a 'processed' output from a single laser. You start with a high peak power laser pulse (e.g. a femtosecond mode locked oscillator) and excite a highly nonlinear process that generates new frequencies (e.g. using a special kind of optical fiber), and at the output you have a continuous broad spectrum. What happens in the fiber is actually similar to sea waves arriving on the beach - a very long and well beahaved wave steepens in the leading edge (which means new frequencies were generated) and eventually breaks/collapses into many small waves of much shorter period.
The laser in this article is probably 100x or even more cheaper than a setup like this, but also does not have the full coherence supercontinuum sources have, so it will be used for different things.
