Standard Mexican Spanish vs Standard Spain/European/Iberian/Castilian/Peninsular Spanish

By | June 19, 2018

What are the major differences between spoken Standard Mexican Spanish and Standard European Spanish? What are the major written/grammatical differences? Is there any reason to think that the differences would make one variety more challenging to learn than the other?

I searched the site for a similar question but only found this and this, which aren't quite what I'm looking for.