I don't believe it is measurably different! Apart from what you noted (HFCS is "high fructose" relative to normal corn syrup, not table sugar), ordinary sugars are broken down instantly by the human body.
The subtext and I think valid concern about HFCS is that it drastically reduces the cost of calorically sweetening foods and especially beverages.
But people routinely cruise past that to claims that HFCS itself is uniquely harmful to humans, and it isn't, at least no more than sugar is.
I think it's fairly safe to say there's a measurable difference - fructose generally (afaict) has noticeably lower insulin responses compared to glucose. Though it's still very minor compared to the total change vs none of course, and I haven't seen much of anything showing evidence of a benefit compared to the other - just "technically different".
Definitely agreed that there's a weird demonizing of HFCS in particular though. Maybe because it sounds technical? It's easy to point to because it's common, and it doesn't sound "natural".
And personally I don't think HFCS's clear manufacturing benefits really affect much, it's just the most convenient so it's the most used. The addictive qualities of sugar are much more valuable, IMO They™ would continue to sweeten things at the same level even if it were completely banned. They'd just use something else, and sucrose is also very cheap.