I have used multiple setups of Dynavap, including the 2019 Ti tip and low temp cap with a Simrell Vortex stem. The 2020 stem doesn't hold a candle to the cooling of the vapor, or the ability to create a suction. As a result, the 2020 stem is a bit harsher of a draw (still not really harsh for me), and messing with the airport is needed to get heavy hits. However, the ergonomic feel of the 2020 stem is excellent, with indentations for your mouth and for your fingers to find the airport with ease.
Flavor wise, the new tip design does improve things. Being a SS tip, heating takes longer than the Ti tip, but this is not a knock against it. The 2019 SS tip takes extra time to heat too.
My only complaint really is the longevity of the carrying case. I wish it were coated with a lacquer of sorts to make it last longer...but I guess it was never touted as the best case ever.
Overall, a very good product.