Which sharepoint exam is the best to begin: 70-488 or 70-489 ? And which one is the easy one?
You can reference to this page for the full SharePoint developer certification path: here.
As you can see 488 is the basic exam and 489 is the advanced one, so (hopefully) you need to take them in that order.
Also notice that if you want the MCSD certification you will have to take the other two exams.
(screen taken as of 03/07/2014)
488 is the core one and 489 the advanced one, so you should normally start with 488 that is the easier cert.
I have passed both.
More information about 70-488: https://www.microsoft.com/learning/en-us/exam.aspx?id=70-488