An Australian retailer has pricing on their website now: https://factorysound.com/
All prices in Aussie dollar, not USD, but they should give you a guide on RRP and expected real world pricing:
DT168s are listed as RRP: $3,499.00 AUD
DX168s are RRP: $2,999.00 AUD here but listed as $2,590.00 AUD on their website.
So, the price difference looks in the range of 25% extra for the Dante version.
Barryjam, I just bnoticed this https://www.allen-heath.com/ahproducts/sq-slink/
Can you run an ME-U on that card at 48k while you run a DX168 on the inbuilt SLink at 96k? Would that even be useful? Not sure…