It is one and the same. I guess JMH (The Creator) registered pscontest.com to redirect to the main site shortly after it was born.
Domain Name: PHOTOSHOPCONTEST.COM
Creation Date: 2001-11-21T05:43:03Z
Domain Name: PSCONTEST.COM
Creation Date: 2002-03-13T20:04:10Z
Also check out the Internet Archive Wayback Machine. There are even some surviving linked images from the dawn of PSC.
Quote: Posted: 2001-12-13 02:12:35 | By: mike
DChance: Photoshop 6.0 works perfectly fine under Windows XP, no problem whatsoever.