I have a few Hurons, including the two 30 mm ones mentioned and the 3-9x40 1". I think the main practical difference between the 30 mm and 1" Hurons of similar magnification is the overall length. I've had to go with the 2.5x10 or 3-12 just to get the ocular far back enough for proper eye relief position.
I'm posting a screen shot from a recent video by Desert Dog Outdoors on scope eye relief. He measured actual eye relief (using a jig he set up with a small light). He acknowledges it's not a perfect laboratory measurement but it's probably accurate enough for this comparison. Anyway, the table shows how Trijicon seems to understate their eye relief.
I won't argue with 1000yards' experience; there seem to be differences in how people perceive eye relief, and obviously it wasn't long enough for his 30-06. From my limited experience with a few Hurons, I find the eye relief to be longer than what Trijicon states.