Newbie question. Just starting out - 3 weeks into the Fundamentals and when I started work on, for example, the Em chord I found that using fingers 2-3 are easier for me than the 1-2 in the lesson. And the Chord Finder displays using 2-3 -- now I'm at the lesson changing from Em to Am and Lisa is talking about how it is easier to just move the one finger using the 1-2 Em.

Should I at this point concentrate on what is easier for me to do or should I work on learning both shapes for not only the Em, but other chords as well ( like 2-3-4 for G rather than 1-2-3)?

Thanks!