I don't remember. I think the Templars have higher strength, and the Hospitallers are more agile. So, one's tougher and more damage dealing, one's faster. If I can add Templar surcoat models and Hospitaller surcoat models, they'll be getting those, and different stats on them. The Hospitaller armour will be less heavy but less protective, while the Templar armour will leave them moving more slowly, but able to take more hits.
By the way, the Templars and Hospitallers and made to deal with the Dark Knights. Other Kingdoms will be getting troops to deal with the Dark Knights as well. However, one-to-one, the Dark Knights will always win.