1. Classic (or version 1.0) engines
2. TBox (or version 3.0) engines
Tricentis’ TBox engine was introduced in the 7.x series and has several advantages. Tricentis has been creating more and more TBox engine modules.
Tosca has discontinuing support for Tosca’s classic engines after the planned release of Tosca 15.1 in February 2022.
Please Check out blog for more information: http://ow.ly/UOM750HFOeK