eh? I was trying to come up with a mega-slam for that, but I couldn't. eh... the only thing I can come up with is a VERY weak inference... and I don't think it even falls on the scale...
bah.
the difference between HP and LotR is the fundamental reasons behind their actions - while HP is primarily the quest for personal power, prestige, money, and fame, LotR is the quest for the good of all beings in Middle Earth, even if the main character ends up dying (which we have premonitions of in the second book. Frodo decides resiliently to carry on his duties, though.)
why I like LotR? the writing quality is better, the words are much more majestic and grand, and the end scene filled me with that feeling you might get in a movie where the main character just "died", but amidst resounding orchestral fanfare and pomp and ceremony, his hand breaks through the rubble, and he climbs out at great pain, and yells "I LIIIIIIIVE!" .... uh...
but not to stray off topic - HP, also, is centered on the world of Harry and his two to four friends, depending on the situation he's in. Usually two. This, although it may not seem apparent, is a focus on your own life, me, ME, M E.
LotR, on the other hand, regularly interchanges between three parties, or more, giving you the scope of the entire war for Middle Eart, and how a vast sample of demographics are affected, and their reactions. now, LotR is more concerned with the rulers and their armies, but that's actually who's fighting the war.
eh, running out of energy. me and my lazyness.