You can use this new model in Terran-SupaPower mod or you need to create a new unit/actor in the data editor. I added also a new unit and wireframe icon.
I know in animations there are problems ( objects don't disappear properly, textures bug) , but they depend on m3 exporter and i will correct them when the script will be completed. http://www.sc2mapster.com/assets/new-marauder-model/
Minimal differences in the main model animations. In the original model there are "smoke effects" . Several differences in death animations : blood and explosions effects are missing. In death eviscerate ani there are problems in textures, probably because of the exporter.