It’s not the carcass of the Mary that can squirm, it’s the knobs on it – they’re longer than the dhf ones. I run my Mary at the same pressure as the DHF generally.
The DHF is definitely better on hardpack – I notice the Mary having less grip. But equally on the natural steep trails the Mary feels like it grips and steers better when it’s wet.
I can’t say the transition on a dhf feels weird – it’s quite a rounded tyre.
The DHR2 however feels like there’s a gap from upright to lent right over and you have to really commit with it as a front tyre (my experience anyway). Thinking about it they do a 2.4wt version of that and some people really like it on the front.