After thinkin about it, I notice that each characters are not written the same way.
US ver Sam Tyler is like Alex whereas he would have sex with
What is interesting with U,K Sam is that he someone wigh high morals. I mean, he doesn't have a problem with gay people(which is a good thing), but he is someone who does things
in the name of justice. He is also unique in which that he is the only character who doesn't have sex in the past. Sure, he was raped, but that he was drugged out and it was against his will. Just that the Uk version has a geniune love towards his GF whereas he wouldn't cheat with her. The US version is a ladies man where he banged Gene's daughter spoiler [spoiler]who happens to be his sister[/spoiler] as well as another women while he was in 73.
l also concur that Ashes to Ashes loses some of its mystery by makin it clear it is a dream
However, l think it is done on purpose and probably that the coma world is more than just fabrication.