Vulcanccit... i can not see the point of your question. Are you speaking of user interface? It is quite consistent over the time. It has bryce-like controls since version 4 and you can choose to operate it in a Bryce-like, 1-window fashion (although I would not understand why to give up the extreme convenience of the 4-window approach). Are you speaking of built-in features? Then Vue d'Esprit 4 is the most comparable to Bryce 5.5 (although it preceeded Bryce 5 of almost two years). Everything that came after Vue d'Esprit 4 (which means Vue 4 Pro and all versions 5) is much superior in features compared to Bryce.