The Weiss is going to be closer in terms of your current tonal balance with the Qutest. The LTA is going to be a bit warmer. If you want to warm up your system a bit then the LTA is the way to go. If you are happy with the tonal balance then the Weiss is brilliant.
Full disclosure - I am a Weiss dealer and use the 204 in my office system. I am nott an LTA dealer but Nicholas is a friend and I am a fan of their products.