I cried like a baby when Rose was separated from the Doctor, but I just thought Donna's separation was worse. Because she didn't have any memory of the Doctor after that, even though both of them were such good friends. With Rose, at least the Doctor knew that Rose remembered him, and she had his 'clone' by the end too, so she was going to be okay. But with Donna, he lost such a good friend and he knew that she didn't even recall him- had no idea who he was.

I just think it's sadder that way. :/

Donna's was sad, but at least Donna didn't have to remember all the good times she had with the Doctor. With Rose and the Doctor, they both knew how close they were to being together forever.

I'd rather be stuck in a parallel world with the good memories than to have forgotten them.

They both were awful. But I think I cried more at Doomsday.

Doomsday was so incredibly heartbreaking, and if they'd just left it thre with Rose, then maybe I would have picked her. But I think the fact that Rose came back in the show negates it a little bit.

But with Donna, I just felt so bad because she'd had these amazing times and she just ended up stuck in her old life, never realising how much she'd achieved and been through when she'd led this amazing life for a while. And it was sad for Ten too, because they were such good friends and you really felt his loneliness, more so than after Rose.

its ok then you forget the memories its like they never happened but to be stuck in another world and the doctor and rose loved each other

at least rose still has her memories unlike donna (who is still fighting as the doctor says in the end of time). Rose she gets to keep her fond memories and as torchwood is in that world there is bound to a version of the doctor (wouldnt it be cool if the doctors hand and parralell TARDIS met parallell doctor and the other parralell TARDIS ( as the TARDIS rose had came from another parallel world the one were donna was and the doctor that died))rose gained a whole new familie she got the better end of the bargain i think