Similarities between LOST and Game of Thrones:
*Both G.O.T. and LOST expose us to more and more groups that were around before the groups we are originally started with.
*G.O.T. 'The Sight' (Greensight) in a way is like the flashes backward and forward with the wheel on Lost.
However, in G.O.T our characters aren't moved through time through the use of 'the Sight'.
*There is magic on the Island and there is magic used in all the different lands of the World of G.O.T.
Character matchups (G.O.T versus LOST):
Beric Dondarrion and John Locke: (healing powers)
Bran and Desmond: (have special capabilities)
Brienne and Ana Lucia: (great fighters)
Cersei and Eloise: (both calculating)
Cressen and Leslie Arzt: (Die from weapons they are holding)
Daario and Sayid: (assassins)
Daenerys and Kate: (more dangerous than you anticipate.)
Drogo and Sayid: (Not the same person after magic is used)
Gilly and Claire Littleton: (have newborns)
Hot Pie and Hurley: (comic relief)
The Hound and Mr. Eko: (Fighters)
Jaime and Sawyer: (unpredictable)
Jon Snow and Jack: (Main heroes)
Little Finger and Benjamin Linus: (calculating and manipulating quick based on chaos)
Melisandre’s Black Smoke Stannis and Smoke Monster: (Smoke monsters!)
Ned Stark and Jack: (sacrificed their lives for their groups)
Samwell and Charlie: (Love interest for the mothers)
Sansa and Juliet: (between two opposing groups of folks)
Tyrion and Sawyer: (One step ahead of everyone and good lines)
Tywin and Jacob: (Trying to keep things going using candidates or heirs)
There are loads of differences. What similarities have you spotted?
Robin and Roberto make some comparisons between the two shows here:
*The feud between Damon Lindeloff and George R.R. Martin:
Game of Thrones: Threads at the TV Critic
LOST: Threads at the TV Critic