Without going to far in-depth with how far askew test measurements can possibly be, everyone should understand that test methodology will have a profound effect on the results.
In the case of the Stereophile test review, it has to do with microphone positioning and Peter Gansterer's choice to wire the tweeter out of phase with the mid-bass driver array. The position that is used by Stereophile places the mic much closer than the listening position, usually at 1M from the speaker, on axis with the tweeter. What is shown as an exaggerated suckout at the measurement position, resolves into a relatively flat response at the listening position. Peter Gansterer measures his speakers with the mic 3M from the speakers at about 1.5M from the ground. This is much closer to the normal listening distance of the average listener. The current Mozart Grand is wired identically, and achieves even greater listening pleasure than the original.
As you can see, you should probably be wary of test measurements. Do not judge an audio product by how it measures. Listen to it, and decide if you like it. I think that Vienna's products are eminently natural and musical sounding. They produce dynamics and scale that are much larger than their physical size implies, with a wonderful sense of space, dimensionality, focus and tonal/timbral balance. No test measurement could possibly determine this.
The simple proof of all of this: Robert Deutsch had wonderful things to say about the Mozart and its performance, and gave it a rave recommendation. To this day, the Mozart, and its progeny, continue to be the greatest selling speaker in the Vienna lineup. A Sumiko staff favorite.
For a review of the current Mozart Grand, check out this link:http://www.avguide.com/products/product-3405/
In regard to finish variance and center channel setup:
These are natural wood veneers, and will vary with build and age. The two examples shown are on the extreme end of the scale, with most example falling towards the darker of the two. Pairs are matched at the factory for this reason. Also, strong lighting tends exaggerate the differences between to dark wood examples.
Prior to the server loss, I had posted a short treatise of speaker setup, with and emphasis on the center channel. I have not the energy to recreate that post but I will give you the basics:
1. Set your center channel to LARGE in the setup menu. CRITICAL!! This eliminates distortion caused by the cheap crossovers in most processors/receivers, and the thin sound of a bass-less speaker.
2. Place it either very close to the wall (back within 4" of the wall), or more that 20-24" from the wall. The in-room position is better if you have the space. This eliminates most room boundary interactions. The area between those to points is UNSUITABLE for ANY speaker.
3. If the speaker is lower than 24" or so from the floor, or higher than 36" from the floor, angle the speaker up or down into the listening position.
4. If you have hard surface directly below the speaker (ex: the top surface of a large RPTV, or hardwood/stone/tile floor), place something soft underneath it. This will minimize detrimental reflections that will smear the sound.
Keep it coming!