Unique
I like this idea here of showing your older art and doing it in a new way. It does show how you've grown as an artist and how far you've come. I love the details in each and the coloring. I find the new art should have had the same background, but for the newer piece you went with a circle. Is that to say you've come full-circle? I think you should have given a shot at the same background as the last one in a new way, but perhaps it did not fit in with your new more improved style. I love pokemon and I love this so good job and keep it up. Maybe many years down the line you can add a third piece to see how much more you've improved over the years. Sofar I like what I have come across, this type of style does great at times and other times its just so-so but again I like what I have seen here today.
~~THINGS TO IMPROVE ON~~
Maybe do the same background as the original art to really compare your skills but it is just as good as is.
~X~