I found some answers on Quora I hope it can help you get some similarities and differences!
https://www.quora.com/What-are-the-cultural-differences-between-Argentina-and-Uruguay
"será" refers to "him"
"serán" refers to "them"
"seremos" refers to "us"
"serás" refers to "you"
Not sure what uds means so I'll leave that
Los gauchos utilizan ___________ para hacer tropezar los animales.
Answer : D.) las boleadoras
Explanation : The boleadoras are a hunting tool for Argentine gauchos. They consist of heavy balls joined by a cord that are rotated and thrown over an animal that is running, they get tangled in their legs and make them stumble and fall, facilitating their capture.
Caminar, bailar, o siempre tomar las escaleras.