In the US, the Jaguar is cheaper.
That shows the MS being $87,762 USD and the Jag at $95,150 USD.
In the USA, the MS starts at $78,200 before incentives in black only. The Jag is $70,495 in either white or black.
When fitted up with nicer wheels, red paint, light interior, and ACC+Autosteer (no FSD since it does not exist) - MS75D 5 seater is $93,000.
When kitted up the same (plus HUD, leather, etc, etc, etc) the Jaguar in red with nice wheels, light interior, ACC+Autosteer is $86,895.
But you end up with more luxury features on the i-Pace though.