Sort of, but not really. There is lot of bullet technology that wasn't on the market 20 years ago.
Gelatin tests are great, but I am just not sure they measure the effect of introducing high pressure gas into the wound very well.
I don't know of many bullets on the market that haven't been around in some form or another for at least that long.
There's nothing really different other than the marketing
They are still mostly copper jacketed lead projectiles that follow the laws of physics