Honestly, I prefer Terraria. They're both good games, I just like Terraria more.
Terraria is pretty much 2D minecraft. Not saying it's a bad game, I just don't see how anyone thinks it's better. Minecraft simply has more options on what to do and where to go. Of course, Minecraft isn't as focused on fighting as Terraria is so if you like fighting more than exploring/building I suppose Terraria is more attractive.
Terraria is not a 2d minecraft terraria is made for adventuring and battling mobs and has tons of more items made for killing stuff whereas minecraft is mainly made for building as there are more blocks made for aesthetic looks.
So don't say terraria is a 2d minecraft because it isn't.
Oh and has anyone seen the 1.9 update the villagers look like squidward xD
Notch and the rest of the Mojang team are apparently working on item enchantments and he even tweeted a picture of an enchantment table - it looked quite cool.
sooooo... i heard that notch would be taking things off terreria... he got potions already... and with 1.9 comes buffs/debuffs screens in the inventory...