They're both great cars!
I have what you have and what you are considering--2019 I-Pace and a 2017 Macan Turbo. Functionally, these cars are pretty equal. They both perform like a good sports car, but carry gear like an SUV. But as they are similar, they are very different in how they look, drive and feel. The Macan handles better, but the Jag just looks better--it's the design of the future. The Macan looks great also, what you would expect from Porsche Design.
The Porsche sounds better, of course, while the Jag is almost totally silent. Both are cool. The porsche sounds like a proper sports car, the exhaust screaming with the turbos quickly winding up the revs with almost no end in sight. The massive torque in the Jag comes on without any sound at all! Unbelievable acceleration in almost total silence! Both are thrilling in their own way. I think they are equal in the quality of the fit and finish. The Jag's software was updated when I bought it and I haven't had any problems at all. I use Apple Car Play in both cars so perhaps I'm missing some of the software grief I read about here.
I drive both and can't really choose a favorite. For a long trip in the country, I suppose I'd take the ICE Macan just because I can count on gas stations everywhere. But around town and on short trips, the Jag is our main choice. Jag dealers are defitely dealing right now--not sure why the I-Pace sales are so slow, but I can tell you, it isn't the car! I think the JLR marketing department has blown it so far.