I have two different versions of original Mass Effect 2 in my Steam library and don't know what the differences are. They have unique ids and even the space for installation differs. Notice: This is not about the Remasters. Have a look at the links please. Can you tell me what's going on?

• Mass Effect 2 (2010), Space required: 12.76 GB: https://store.steampowered.com/app/24980/Mass_Effect_2_2010_Edition/
• Mass Effect 2 (2010) Edition, Space required: 18.23 GB: https://store.steampowered.com/app/2362420/Mass_Effect_2_2010_Edition/