There are loads of threads on this forum about what you need to maximize reliability/longevity for SDcards used in dashcams, some a bit more technical than others. But the bottom line is, in a dashcam that does a
lot of recording (ie. parking mode): an MLC-compliant card is a must. The Blackvue-branded cards are MLC, and there are a small number of manufacturers making MLC. So far, the only 128GB MLC card I've been able to find (that doesn't get into horrendous pricing) is the Blackvue-branded.
Sandisk doesn't make an MLC-compliant card. If their High Endurance card was MLC, they'd most definitely mention that in the specs, because MLC is expensive.
I personally haven't used the High Endurance. Partially because I already have a 64GB Blackvue, and my next upgrade will be to 128GB (which reduces the playing field). My expectation is that it'll last longer than, say, the EVO+ (which I have tried, and I started getting errors in about 6 weeks), but not as long as a true MLC. But the flip side of that argument is that if it lasts (throwing out random numbers) 80% the life of an MLC at 50% of the price, then you're ahead of the game.
I, for one, will be very interested in hearing your real-life experience with the High Endurance. If you make it through six months of typical recording (which, with parking mode, means near-continuous), I'd call that "close enough" for any argument. If, on the other hand, it starts throwing errors within two or three months, that'll be very interested to know too.
Brad.