Enamorada de Ti reworks original Selena recordings in order to illustrate how she may have sounded in 2012 if she were still alive.
Generally, this means that the original recordings have been pushed ever so slightly toward the mainstream -- for instance, "Amor Prohibido" has much of its overly stiff drum machines stripped away, replaced by warmer studio musicians.
This isn't quite enough to make Selena sound contemporary -- these songs are rooted in the '90s and sound that way -- but it is a relatively fresher repackaging of her music than many of her posthumous releases.