Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs approximately the same to get the Jaguar XJ to the dealership as the Lexus GS 450h.
The Jaguar is tremendously costlier than the Lexus GS 450h as far as MSRP.
Utility
Neither the Jaguar XJ nor the Lexus GS 450h has a marked advantage with respect to seating capacity.
Dimensions
Your wallet will hurt more every time you fill up the Jaguar XJ than the Lexus GS 450h because of its bigger tank.
The Lexus GS 450h and the XJ compete for the same parking spaces.
The Jaguar XJ's longer wheelbase will result in a smoother, more stable ride; on the flip side, the Lexus GS 450h may give a more agile feel in daily traffic.
Performance
In terms of horsepower, the Jaguar packs quite a wallop and will knock the Lexus GS 450h down a few rungs. On the other hand, keep in mind that high horsepower engines often command higher insurance premiums.
Handling
With its tighter turning radius, the Lexus GS 450h is most certainly sprier than the Jaguar XJ, something to consider if you do a lot of city driving; however, keep in mind that a vehicle with a tight turning circle may feel a bit twitchy on the highway.
Drivetrain
The XJ's engine is significantly bigger than the Lexus GS 450h's. Bear in mind that larger engines may use more gasoline than smaller ones.
Torque equals pickup, and the Jaguar XJ will have picked up and gone by the time the Lexus GS 450h finally gets moving.
Warranty
The Lexus GS 450h and the Jaguar XJ have the same basic warranty.