I sure do love to waste money. In this particular case of diseconomy, I threw away a couple of bucks on the CD rendition of Davis Cup Tennis. It's pretty much the same game as its chip counterpart, which isn't necessarily a bad thing, as DCT is by far the most realistic and enjoyable Turbo tennis title.
As far as differences go... well, let's start with the music, which is red book this time around. DCT's title-screen tune as arranged for the HuCard is actually quite distinct and memorable, and it's delivered in much the same manner here; but while the chip jumps right into it, the CD starts off quietly and "builds up" to the wonderful lines DCT fans are already familiar with. I prefer the Hu approach. In fact, comparing the Davis Cup soundtracks only served to make me appreciate the card's impressive drum sounds. Of course, tunes aren't much of a factor in this game anyway: aside from the aforementioned main theme, the only music comes during between-contest stat and menu screens and pre-Davis Cup-match national anthem performances.