Even better would be the force vs displacement graph as that really tells the story of key feel, here is one for MX Blue.
The other MX graphs and some good info on WASD's site here;
Bump = kinda. It is not like the typical mechanical feel. For mechanicals that have a bump, most have it third or half way down the travel (and the activation point near it).
Textblade doesn't seem to have a bump per se, but most of the resistance is at the top of the stroke where you are unlatching a magnet so there is a distinct sensation of overcoming that threshold.
It is quite hard to press a key just part way, you overcome the latching force and down she goes. As Wout said, it is a little reminiscent of the much loved bucking spring although it is much smoother, has lower force (maybe 65g for BSpr?), and half the travel so don't expect it to feel just like an old Model M.
A bunch of stuff I am going to say next is just how it seems to me, just my subjective view of how the forces and activation points feel to me - the truth may be different.
The operation point seems low in the stroke (makes sense since for most reliable capacitive sensing you want the finger as close as possible). If I make a very deliberate effort to steady my hand on the desk and hold my finger firmly I can push a key part way without bottoming it out. Bouncing keys in this way it seems like operation is at least 2/3 down, sometimes it even seems like its at the bottom.
It could even be that activation is not at a fixed distance in the stroke, but depends on the TB getting a strong enough 'signature' from the sensing to make a determination.
However, it turns out the depth of the activation point is mostly irrelevant because of the key action I described above. In normal use pressing hard enough to unlatch a key and begin a stroke automatically commits to pushing through to the bottom - at least that's how it seems with the way I type.
The release at the top coupled with the subtle 'clack' at the bottom produce a very satisfying action IMO.
Correct, no click and no mid travel bump. Worth noting though that mechanicals like MX have steadily increasing resistance from the return spring so they kinda need a bump & click from the switch for feedback or they'd feel like mushy little pogo sticks. TB has collapsing resistance so to me doesn't feel like it needs bump or click. It doesn't feel mushy like collapsing rubber domes though, at least to me. Magnetic seems to have it's own feel.
As above, 45g, which combined with the short keystroke, low noise, and reduced finger movement makes for quite a 'soft' and stealthy action. Add in the fact I'm using Colemak which massively reduces finger movement vs qwerty and it's hard for people to see I'm typing at all. I look forward to the confusion I'll cause when I take this thing out in public.
In fact I think I am going to tell people it is a new type of psychic keyboard that just senses your thoughts because that's what it looks like when I'm using it
MX red are more of a gaming oriented switch, light action, minimal bump, no real click, and with activation and reset points close for quick repeated strokes on partial travel.
Depending on what roll you end up using TB for you might want to consider putting small soft o-rings under your MX Brown, can quieten them down a fair bit while leaving the bump unaffected. Then you might use that at the office and perhaps even replace with a MX Blue at home for maximum clickiness.
Just a thought.