Name Your Favorite Song/Arrangement Pairing
 

Simple fact: Most of my favorite arranged tracks aren't versions of my favorite original tracks. The reasons are easy. What are the odds that a remixer is going to take on my favorite track? And when they do, how can I know they're not going to mess with perfection? Or, the arrangements could be riding the coattails of its excellent source material.

There are exceptions. Name your favorite pairing: the original tracks and its arrangement, fan-made, doujin, same composer, official release, whatever. Both have to be stellar. Name one pairing or name some. Here are mine:

Chrono Cross - Star-Stealing Girl and Time & Space Vol. 2: A Tribute to Yasunori Mitsuda <The OneUps> - 02. Star-Stealing Girl

Starfox - Corneria and The Wingless - Godspeed

Final Fantasy X-2 - Eternity ~Memory of Lightwaves~ and FFX-2 Piano Collections - Eternity

Let's see...

Xenogears - Dajil, City of Burning Sand and Xenogears: Creid - Dajil
Xenogears - Gathering Stars in the Night Sky and Xenogears: Creid - Spring Lullaby
Xenogears - Ship of Sleep and Regret/Flight and Tribute <BB and takrockers!!> - Episode Alpha - Fei

(I clearly love Xenogears)

YouTube Video

and

YouTube Video

BigBlah, what doujin artist did that remix? I'm a big fan of Touhou music myself and would like to know.

I have to (deeply) agree with Ziggy's first post. CREID is simply amazing. :)

Let's see what I can add:
Rogue Galaxy OST - Theme of Rogue Galaxy and Rogue Galaxy Premium Arrange - Theme of Rogue Galaxy (Original composition by Tomohito Nishiura, arrangement by Yasunori Mitsuda)
TMNT4: Turtles in Time - Sewer Surfin' and chumble spuzz - Turd Surfers (OCRemix.org)

It's the group Demetori. That remix is from Sinen ni Nozomu ga Gotoshi.

I can't really say what is my favourite track or not, since I am really changing the favourites each week.

But well, what really stayed was ''HIkari'' by Utada Hikaru and the Prince of Persia songs composed by Stuart Chatwood.

Oh, undoubtedly Final Fantasy X-2 piano collections - eternity :D

Not sure about any favorites, but the first pairing which came to mind is the original Tetris theme and Jeremy Robson's Piano Concerto in A minor.