For more than six months that I was the boards I must say I find them the same as the vs-15 in sound.
Aesthetics and the finer vs-15 there are small plots below and are more rounded.
Specifications are the same as vs-15.
I think the treble a bit "showy."
Used with a subwoofer they are perfect in acute head and medium.
For over a year since I use them, and never a problem.
I klesa used with two boxes of the same dice low marks VS-18-BX