It's hard for me to tell very well at this point. Perhaps a few more weeks and they'll make it more obvious.
The comb on the little splash and smaller buff looks the most feminine. The bigger buff has the most male looking comb (it's fairly wide and maybe has a bit of a reddish tint to it).
I'm not seeing any streamers starting yet on the splash or smaller buff. The larger buff I can't tell, some of the feathers coming out of the back of the crest could be the start of streamers or they could just be the crest feathers coming in more.
None of the combs look to be really coming in yet however. A lot of my 10 week old males already have the combs starting to come in. I wouldn't rule out that they may all be pullets some may just have some more cockerel like features. I could definitely be wrong though.