Actually, there is no real difference between Senozon Via and Simunto Via. Development of Via started 2011 at Senozon. In January 2018, ownership of Via was transferred to Simunto, which continues to support Via and will further expand its functionality.
All versions up to and including version 1.8.0 of Via were released by Senozon, while newer version (1.8.1 and up) are released by Simunto.
While Simunto is the main contact for inquiries about Via, Senozon might continue to offer Simunto Via alongside its data products to its clients.