The brightness of IC434 is similar to that of the Veil.
I beg to differ. It must be considerably fainter. The Veil (eastern half) is easy as pie in any of my telescopes, even unfiltered, but I've never seen a hint of IC 434, despite looking for it on some very good nights in the past.
What you say matches my experience. I've seen all three major parts of the Veil, many times in many scopes - 80mm to 300mm - at my yellow zone site. Not difficult at all. I've tried several times to see IC 434 and B33 here at the same site and have failed ... or have given up after trying for awhile, which amounts to the same thing. I have heard that if you can't see IC 434, don't try for B33. Makes sense to me.
In the meantime I've observed about 900 other faint and fuzzy objects at the same site.
I'd rather spend an hour or so observing a dozen other objects I've never seen before than trying once again to see this one object I've never seen before. Eh... Maybe one day.