Cosmologists and Evolutionists

Scientists in both fields of Cosmology and Evolutionary Biology are for the most part non-believers, I would wager. However, I think I have noticed a suttle difference in the atheism of these two disciplines. Many of the evolutionary biologists seem to be hard-nosed 7's on Dawkins scale of disbelief. PZ Meyers comes to mind. Hell, Dawkins said he's a 6 in the book but then said he was a 6.9 on Bill Maher. There seems to be much more strife there. A lot more friction.

Then you got Hawking and Kaku and Greene that, while not prescribing to Christianity...and probably atheists as well...the way they go about is different, I feel. They're a little bit softer and less strident than their biologist friends. 

I just wonder if this has anything to do with what they study. Perhaps looking at the different scales of things makes a difference. Look at the grandeur of the universe, the Big Bang, and the uncomprehendable quantum world. ....Then again, maybe the biologists get that same feeling from studying fossils and DNA. I don't know but yes you can definitely take a look at people like Hawking and Einstein and Greene and notice some difference in their attitudes compared with that of PZ Meyers and Dawkins. 

I like the strident nature. I am strident myself at times but I am simply noting a difference I see.