Artisteer and Template Toaster both are same companies.
They just did some marketing to capture attentions of those customers who were annoyed of Artisteer.
Artistter stopped at 19th Nov, 2013 and TT at 19th Dec, 2013.
Both softwares are being updated to have new features and you will see little differences when both will announce their next release.
TemplateToaster will also have online export requirement as of TT.
Just wait and see, Time will Tell.
It is real modern world marketing.