reach is only better in 4 ways
1 forge (self explanitary)
2 the melee, H3s lunge smack is stupid, its range is a piss take and makes the AR pointless over a shotgun because they have the same effective range
3 the AR, in H3 its ^^^ in reach its improved bit it still feels worthless outside smack range
4 rank, this is opinion based (so dont -blam!-) but i think the reach rank system is better because theses nothing for people to take to seriously but getting exp just for playing is retarted because thers no reward u win either way score means nothing so whats the point in having it
halo 3 is more fun to play
the granades arnt stupidly overpowerd
H3 generally requires more skill
HALO 3 is HALO reach dosnt feel like halo it dosnt look like halo and with loadouts, credits, gaining exp just for playing not wining, buying new armours not unlocking them its a cross between halo and......crp