Advice sought on LS Router positioner Vs Ultra 16

I am interested in box making using dovetails/simple box joints and general precision routing.

Considering both Incra Router table positioner options........ has anyone used both? I assume the LS (4th generation positioner) being newer offers significant advantages over the Ultra but not sure whether a newcomer could take full advantage of all the features(!).

Certainly the dust extraction on the up spec (expensive) S version is important- seemingly overlooked on the Ultra version.

The Woodpecker website is not clear on relative comarisons between each option and I guess as always the devil is in the detail which you discover after parting with the hard earned cash.

Any feedback most welcome!

Rgds,
Brian