Both speakers are excellent at creating, if it's in the recording, a very large precisely layered soundstage that extends past the outside edge of the speakers with space/air between the instruments.
Both speakers would work in a small acoustic space. However, the Perfect Set is a much larger speaker then the Model 50. Also, the Tekton speaker does go deeper in its bass extension, so it could possibly over load a very small listening space.
Imagine all the speed/dynamics/aliveness of a horn design with no horn colorations. Then add on a great extended high airy top end, great bass, and a detailed transparent midrange that allows what ever amplifier you are using to be heard regarding timbres/tonality. I have listened many hours with both a SET 2A3 amp and a restored Threshold S/350e amplifier with the Perfect Set and find I'm enchanted with both amps in the system. The rest of the system is a CEC transport, Lab 12 DAC, LTA Micro-ZOTL into the amps I mentioned above. Think of the flexibility with this speaker, you can use a SET 3 watt tube amp or a 350 watt SS amp with superlative results. If you already have listening experience with either the Double Impacts or the Double Impact Monitors you know what the Perfect Impact sounds like, just add outstanding linear extended bass which is totally integrated with the lower midrange.