I'm pretty sure it doesn't work, I'm trying anything possible, nothing yet, but maybe someone with a GECK knowhow can tell us if it is truly broken or just our eyes seeing things.
Daniels, Rex is a terrible Companion.
Edit: FORGET WHAT I SAID, it doesn't work period. No matter what I do, the DT remains the same (even Veronica, and she's bugged because of her I could make you care quest, making the DT she has when the quest ends become her actual DT no matter what), Obsidian failed hard this time.
not only on that, but I noticed they nerfed the Companions badly in the last patch....why even bother having them when they svck this hard? near at lvl.50, Veronica has 390 HP, and ED-E 266, both of them can basically get killed almost instantly by higher level enemies, such as Cazadors and Deathclaws.
Well you need to realize that the difference would be minimal. For instance, a DT bonus for Boone wouldn't do a damned thing until you equip him with armor. Same for Raul. Even if you have them in full power armor, a 50% increase would be about 15 extra DT for the companion whereas 25% would be 7; REALLY not a big enough difference for you to notice it just by watching the companion.
As for the damage, again, there's an issue with noticing the difference. Here, if you give a Brush Gun to Raul, you'll definitely notice a difference because now he hits for 112 damage per hit with 10 charisma.....or you WOULD notice, if he wasn't one-shotting everything regardless of your charisma. He's hitting a minimum of 75 damage a shot, a max of 112. It's not THAT big of a range that you'll notice in combat, because there's not THAT many HP-heavy enemies you can fight that with companions to see if you notice a difference.
I think Obsidian would DEFINITELY notice if it was bugged since designing the SPECIAL and basic stats is like step-[censored]-one, and if they didn't, I think the Vault would. But although I appreciate that they tried to give Charisma a practical use (unlike FO3, where it literally doesn't do jack), I think the reality of the situation is that the help it provides is still small. The only time it would be extremely noticeable is if you give your enemy power armor and an automatic weapon. A
GOOD automatic weapon.
If someone truly wants to test, then either open up the Geck, or use console commands to spawn something like the Legendary Bloatfly, then heal the HELL out of your companion as they try and fight it. See if you notice a difference in kill speed or how often you heal them. (be sure to use decent weapons and armor on the companion so the difference is more noticeable, don't use a DPS weapon on the Legendary Bloatfly or anything else with high DT)