A few days ago in a discussion about the 120 with and without fullers, someone asked to see them side by side. In the first two photos I have two of the custom versions, the charcoal and indigo blue along side cocobolo and standard models. Interestingly the charcoal weighs the same as the cocobolo: 11 ounces. The indigo blue weighs more: 11.5 ounces.
I have the standard version pictured. I meant to pick up a newer, 8.5 model, but picked up the older, 8 ounce model instead. I didn't actually use the older model, purchased in the 80s, because I didn't like the sheath. Consequently it looks about the same as the newer model. I do like the standard version with the new sheath and have taken it on hikes.
We, some of us, looked up the impact of the fuller on strength. A reference I found said that if the fuller was created during the forging, by moving metal about, it could be just as strong as a blade without the fuller. But if the fuller was ground in after the blade was forged it would be weaker than a blade without the fuller. The appearance of the blades with fullers is (to me) that they were ground in after the blades were forged, but I'm prepared to be corrected. Blade weakness, if the models with fullers is weaker than the ones without them would be relative. I'm sure the blades with fullers are strong enough for any task they were designed for.
Lawrence