For point of reference, I have short root height, narrow-to-medium root width (and starting to venture into Omega-shaped), and am evenly full (neither Full-on-Top nor Full-on-Bottom). The combination of short roots and even fullness makes me functionally FOB. The ABTF calculator sizes me at 38GG.
First, their similarities: They are both 38GG. They both measure 32" unstretched. They are both multi-paneled bras with an upper panel of soft, stretchy lace. They each come in black and tan versions plus a couple "fashion" colors which means that you (currently) have four choices for each of them, provided they have your size in stock.
Band sizes range from 34 to 46 and cups range from DD to K with the largest volume cup being a 40JJ in the Kim and a 40K in the Morgan. All UK sizing. Both have three rows and three columns of hook-n-eye fasteners.
Moving on to their differences...
The most obvious difference is gore height.
The gore on the Kim is 3" tall.
On me, a gore at this height digs into the upper portion of my cleavage. I wan't able to get a great picture of it but it's like I have a bit of "muffin top" at the top of the gore. Long wearings would make this a very uncomfortable bra but it's fine for a few hours.
The gore on the Morgan is 4" tall.
That one extra inch makes all the difference in being able to wear a bra for a few hours and being able to wear it all day.
There is also a one inch difference in cup width with the Morgan being only 5" wide and the Kim being 6" wide (measured from inside portion of the underwires). The Morgan also has a taller outer wire which makes sense because it's a "Side Support" bra though the difference doesn't appear all that different when you're looking at the outside. Conversely, the Kim has a taller wing at 5". Whereas, the wing on the Morgan is only 4" tall.
Kim, 6" wide cup, 5" tall wing.
Morgan, 5" wide cup, 4" tall wing.
They each do have great bottom-of-the-cup projection. The best that I've come across in my bra-fit journey. The Morgan even has accommodation for the pendulosity of a breast.
Another key difference between the two is the stretchiness of the wings. The Morgan has a single-layer of mesh for its wing. The Kim, on the other hand, continues the print of the cup on to the wing and this material is layered over the mesh wing. This provides less give in the wing overall because there are two layers of material.
Kim
Morgan
The Morgan has fully adjustable straps. The Kim does not.
To sum it up, I have four Morgans--black, tan, purple, and blue--and only one Kim. I just feel the Morgan is better suited to all my aspects of fit, not to mention my comfort level.
