OHMSS: The precursor to "Casino Royale"(2006)?

Both films are the debut Bond film for a new actor.

Both films follow a sci-fi/fantasy Asian location Bond film staring a popular Bond actor and are more down-to-earth and serious films than their immediate predecessors.

Both films feature a love story where Bond considers giving up his job for love.

Both films feature less gadgetry than usual.

Both main Bond girls end up dead.

They are the 2 Bond films with the longest running times up to their respective points (1969 and 2006) in the series.

In both films, Bond meets with M at M's home.

In both films, Bond resigns the secret service only to be prevented by a female MI6 employee.

Both films have different style main title sequences than what was done before.

Both films end with the James Bond theme blaring over the closing credits.

Both films feature a more vulnerable and human Bond than usual.

In OHMSS, the first half is slower and more character oriented while the second half is action packed. In CR, the first half is more action packed while the second half is slower and more character oriented.

Bond drives an Aston Martin in both

Bond goes to Casino Royale in both (I know OHMSS the film never says the casino is CR as they obviously couldn't both for legal reasons at the time and also not to confuse viewers thinking they were referring to the 1967 Peter Sellers spoof but those of us who've read the novel know it's CR where Bond meets both Tracy and Vesper, the 2 most important women in his life)

Bond battles thug in casino's hotel in both

Bond has a serious scene with the leading lady in a hotel room where they bond and their relationship deepens