Sure. The confusion is you want to compare the amps as though they are intended to do the same thing. They are not intended to do the same thing and so comparing them, except maybe to say that they both drive headphones, doesn't work that well.
The Liquid Glass is a tube rolling, tube viewing amp. It is what I call a "classic" tube hybrid design. But, better than that it is designed to give you exactly the sound of whatever tubes you are using. The SS unity gain buffer at the output is transparent to the sound of the tubes. Because of the way the tube front end is engineered the Glass can roll many different types of tubes, not just a single type. The voicing of the amp is determined entirely by the tubes in use. If there are any LG owners reading here, perhaps they can offer some experiences on how this works. The Glass has a gorgeous sound with various tubes.
The tubes on the LG are exposed in a small tube cage at the front for easy swapping.
The LC is a successor to and replacement for the LF. I call this type design an "embedded" hybrid. By this I mean that the tubes and transistors are not separated in the circuit, but blended together into a single design which, in turn, gives you the blended sound of them working together. There are no coupling capacitors in my embedded designs, they are DC couple front to back.
The LC is not really designed for tube rolling. Although the sound is modified by changes of tube it is not changed any where near the extent of what happens in the Glass. Hence, on the original LF the tubes were inside behind the plastic windows. You could see them, but to reach them you had to take off the top. There is one tube on the LC and it is enough to create the blended hybrid sound, but it won't be super accessible for tube rolling.
If you want an amp that is extraordinarily flexible in its tube rolling abilities and which will let you fully enjoy the detailed sound of a given triode, the Glass is the amp.
If you want a no-fuss, hybrid amp where you just turn it on and listen to the blended hybrid sound signature, the Cobalt is the amp.
They may cost about the same, but they serve two entirely different purposes.
I hope I did a good job this time.