I'm playing (occasionally) GWs and LOTR after my spare time got cut down enormously and I consequently couldn't justify paying the monthly subs for WOW. From my experience, the previous poster's remarks are pretty accurate.
Both are good games, but unless you like playing mainly Single Player, LOTR is far superior as the user base in GW is far lower than that of LOTR which has an active thriving community.
You can try LOTR for free until about level 32, when the FTP content runs out. If you want to continue, the best option is to buy one months subscription and the legendary version of Isenguard (the newest expansion). This would give you everything you need to get to level cap for about £40.
Check the LOTR thread for lots of info - the main OcUK guild is on Laurelin, but there are quite a few OcUKers on other realms too....