First off, I have owned both the LC and the Jot. I have extensively compared them on my own headphones and other audio gear (see my profile for more details). And of course, I volume-matched the amps when I did my comparisons.
I have to say I disagree with
@Clemmaster here - except for the Jot being bright at times part. The Jot can be sometimes bright, but I consider it to be just slightly brighter than neutral. The LC, on the other hand, is what I would consider to be slightly warmer than neutral. Maybe to some people this difference is quite big, but personally I don't think this to be the case - the tonality of both of these amps to me is a lot more similar than you might think.
As for the more punch part - nope, I honestly cannot hear a difference between the LC and the Jot. Both are equally punchy, and most importantly they're both the good type of punchy, where it's not exaggerated but highly satisfying.
As for the more details part - again, I don't find this to be the case either. The Jot at first listen might seem more detailed because of its somewhat brighter and more forward nature. However, I found that whenever I noticed something on the Jot, I would go back to the Cavalli and find that same detail there with the same amount of clarity.
So why did I say that the Jot and the LC seem to present the same amount of detail, even though my sentence above suggests that it may be harder to find the details in the LC? This is simply because of the presentation. Jot is quite upfront and so all of the details are immediately noticeable whether you want to notice them or not. With the Cavalli, the details are all still there but the amp isn't as forward with those details as with the Jot. So with the LC you can choose to tune out on the details, but with a tiny bit of effort you could easily find those details if you wanted to.
There is one thing that I find the LC to be superior in - the soundstage. First off, I don't really think that the soundstage size of the Jot and the LC are really that different - soundstage width and depth between the two amps are about the same to me. I also feel that the imaging abilities of the two amps are similar to each other. However, I do feel that the soundstage of the Cavalli is definitely more 3D - as in, you are more easily discern what is further and closer to you in the music, something that I usually call "layering." In comparison, the Jot squishes together what is closer and further to you, making it harder to distinguish exactly how far different parts of the song are from you.
Overall, though, I still think that the Jot is a better value simply because while it mostly matches the LC's performance, it's cheaper than even the first run LC by a good margin, and the fact it's not a limited-run product and you can readily buy it. However, I will admit that I kept the LC and return the Jot for two main reasons - 1.) I really like my soundstage technical abilities, which I found the LC to be better at and 2.) I like the appeal of the LC as a limited-run amp that may not be produced ever again in the future. The second reason is really an irrational reason, but hey why not?
If I have more time, I would like to write a more detailed comparison between the Jot and the LC, but hope this short comparison helps anybody who wants to know how the two amps stack up against each other!