Are the elves in The Hobbit different than the ones in LotR?

[Galorme]

Elfs are what most people think they are. The Elfin people are the "little people", who Tolkien wrote Goblin Feet about, and originally this was how Eärendil was conceived, riding on the back of a beetle. These are the Elfs that Later on he invented the Elven peoples, who were totally different. But they also sung and were merry, and the Elves in Rivendel were happy and silly during times of peace, though they were slightly sobered up during the War of the Ring. But even at this time Rivendel was a place of song and laughter. The only difference is that Bilbo, who delighted in silliness and songs wrote The Hobbit, and the LoTRs was written by Frodo, who delighted more in the lore and history and the more serious side of the Elves. PJ, when he directed the movie, decided to make the elves seem aloof and unemotional, though I would have been happier with the movie if they sweet singing of the elves had been heard in the valley below when Frodo awoke.