What is the difference between emollient cream and barrier cream?

Ch

FTM here, and I am so confused with nappy rash creams currently on the market!

I have stocked up on Sudocrem but I’m unsure whether to buy the Aveeno baby barrier cream or Aveeno baby emollient cream. I just wanted something not as thick as Sudocrem.

I was going to buy both until I noticed they both have similar properties! I just wanted to know any differences or if one works better than the other. Many thanks.