Yeah, I agree. Plus the Empire had unlimited resources to throw at them. But in this scenario, the Rebels have a high chance of winning.
Was thinking along the same lines, truthfully it seemed the Rebels only really retreated due to a lack of Armor amongst other things. Have no doubt, if they have some vehicles with them the battle would have been more in their favor provided they would be able to quickly down the AT-ATs.
Question: Is Rogue Squadron involved? That would seal the deal imo.