I would say take the listed spec with a grain of salt. OEM can claim anything and most failed when really tested.
Established branded tints specs baru can trust a bit. Some tints TSER actually worked as claimed but 2nd year, 3rd year, the effectiveness dropped like rocks.
So if you really only looking at specs to decide, then go for established brands but those comes with more premium pricing.
Many tints compared to VKool...but VKool worked as listed and last really long with minimal drop in effectiveness over the years. That is established brand for you. Of course if the VKool used are not fake. Many fake out there.
I also now looking at alternative for my 2 old cars and pending 1 new car coz the prefered VKool are now price so high, I really cannot afford.
Considering front tint used VKool Elite coz VLT is good, TSER worked, last really long (effectiveness) and Smart tag worked. Then the rest used others.
Now considering IRISPro, don't know
smart tag can work or not, if not, really have to consider tinting VKool Elite in FWS coz that garantee to smart tag friendly and TSER worked. Rarely does a tint comes with 10 years warranty and 10 years performance warranty (the first i heard). It is one of the the rare few that listed the nm used for reference test although don't know what is that..hahahaha.
Tempted to try coz price more premium than budget but definitely way below VK. Now still budgeting and dragging it out.
Smart tag use Infrared as signal. U take Tint with 97-99% IRR, sure it struggling to work or basically not working. Based on own experience, 95% IRR the max in order for Tag to work, 90% IRR ok.