Not sure if you're aware, but Matrix's HT ANH Vader for example (in the comp pics) has significant mods to the helmet, that is shown next to an unmodded HT ESB Vader.
ALL 1/6 Vader helmets currently available need quite a bit of work to get them movie accurate. WasteTimeContinuum and Matrix have done amazing things with both the HT and Kaiyodo sculpts. The drawbacks on the HT ESB helmet are still being discussed/debated (for me, most are linked to HT's dumb decision to use a ROTJ reveal brace/helmet sculpt and simply glue it together) while the HT ANH/RO helmet drawbacks have already been discussed thoroughly.
In terms of the nose mod, both HT Vader sculpts have somewhat significant nose issues that require "surgery" - the ESB is too small, the ANH/RO has a nose plug that creates a weird look. I extended the ESB nose downward, and on the ANH/RO sculpt I removed the nose plug and slid it further back (you can also, like Matrix, remove the plug entirely and push some putty in to create a more accurate curve/look.)
And to be clear, I posted the comp pics to evaluate how HT did on the cheeks, eye shape, mouth, dome etc sculpts. Which is all unaltered obviously. The ESB helmet looked pretty bad to me out of the box, but, like the HT ANH, with work it might be made pretty good.
Unmodded, out of the box, in terms of finish and overall look, not really. When I first saw the HT ANH sculpt (as the original V.1) it really didn't look/feel much like onscreen ANH Vader at all - which is a very unique look for Vader (the mixture of handbrushed gunmetal, weathering, matte over gloss.)
The HT ESB at least has a really high-gloss, quality finish that is very ESB, though to me the black/gun-metal contrast isn't prominent enough. In terms of underlying sculpt, they both have issues - both of them, out of the box, felt pretty off to me.