Thanks for the replies guys. I've seen all the previous threads and videos on youtube concerning the individual girdles. I was just hoping to find someone with experience with both. The stipulation is that I have 2 Identical sets of gear, since I travel quite a bit...or at least I used to pre-covid. The Jetspeed is readily available being a current model. I'm sure I could find 2 Tacks, it would take some time for them to show up on the market. I'm also pretty confident the Tacks is very similar to the 9800 I've been wearing.