Yep, my junglas doesn't need a true sharpening even after having many outings where it has fought trees.
Besides, there is no steel named "INFI". Call crucible or carpenter and ask them to make you some INFI, they won't know what in the hell you are talking about. I was talking to a guy as the Busse booth at blade show that said INFI is just busse's name for 52100. Could be true, could be false. But what I've seen in regards to INFI's edge holding, I'd say it's true.
Nope.
Busse's version of 52100 is Sr101. Used by Swamprat, and occasionally Scrapyard, not Busse (Infi).
The makeup of Infi is proprietary. You can't order it from another manufacturer because it is proprietary. You can, however see the actual specific chemical makeup of Infi if you want. There are several good threads that include the chemical formula. That is only half the story. You get that chemical balance right, and still not have INFI. You have to also figure out their heat treat process to get there.
V .36%
Cr 8.25%
Fe 87.79%
Co .95%
Ni .74%
Mo 1.3%
C .5%
N .11%
I can give anyone Wiz Bang super steel, and if they don't know how to get the most out of it (or have the correct equipment to do so), it won't perform like a Wiz Bang super steel.
Even if I gave you pre measured, all the ingredients to make the worlds best soufflé, if you aren't a trained chef, you are not going to make the worlds best souffle. In fact, you probably won't even make something edible.
Process to mix, when to mix, moisture control, temp, time, etc etc.
Same with steel. 52100 is a great knife steel. Lots of custom makers use it, that does not mean I can hand you a bar identical to what the best custom makers use, and you will get a great performing steel, (heck, even if you have all the equipment you need).
Same for any steel.
I have been told that Infi is similar chemically to a steel used for chipper shredder blades. It has been said it is like A8, but modified by adding and subtracting chemicals.
A8:
Cr 4.75-5.50 Chromium
Ni 0.30 Nickel
Mo 1.15-1.65 molybdenum
C 0.50-0.60 Carbon
Mn 0.50 Manganese
Si 0.75-1.10 Silicon
W 1.00-1.50 Tungsten
Cu 0.25 Copper
P 0.03 Phosphorus
S 0.03 Sulfur
By comparing the two, I see elements and chemicals that are not shared, and some that are included in Infi that is not present in A8. I am no metallurgist, but I see a few differences.
INFI is so great because of how it performs. It performs the way it does, not because the metal is magic or it has stuff in it that no one can duplicate. It performs great because it has a specific chemical composition, and a heat treat that has been designed to give it the best performance. Busse (and kin Swamprat and Scrapyard) do excellent heat treat on all the steels they use!
As to the OP's question. I own and use Busse. I only have 6 (although I have owned more than 12).
I don't own any ESSE. They represent a real bargain. You can't beat their warranty, especially at their price point. I think it is telling, that many Busse owners (that own way more than I do), still lay down money, and love ESSE. I have held a few models, and felt that the handles were a bit blocky. That would not deter me from buying one, because I own sandpaper! (and a small belt sander too). Not hard to fix that. Plus, the handles are removable, and you can add spacers if you want! The steel is 1095, with a great heat treat. I don't own an ESSE, but I do own 1095 steel, and it is just fine. (I also own a lot of other steels that don't perform near as well as good 1095, but I still like them, and use them). I feel that 1095 takes a great "bity" edge. Very easy to get hair jumping sharp (as is infi). Infi has better edge retention, lateral strength, and excellent stain resistance.
But, you pay a premium for that (and the handle treatments etc). That is worth it to me, but I still like knives out of more basic steels. (Including 5160, 1095, and other 10xx steels).
Just buy what you like, and use it.