Utility
Drivers with frequent kid-duty might favor the Buick Enclave over the BMW X3.
The BMW X3 outpulls the Buick by a large margin.
Dimensions
Your wallet will hurt more every time you fill up the Buick Enclave than the BMW X3 because of its larger tank.
The BMW X3 and the Buick Enclave compete for the same parking spaces.
The Buick Enclave's longer wheelbase will likely result in a smoother, more stable ride; however, the BMW X3 may give a more agile feel in daily traffic.
Convenience
The BMW X3's fuel tank will need to be replenished more often than the unit in the Buick Enclave.
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 Buick Enclave to the dealership as the BMW.
With respect to fuel economy, the X3 is somewhat better than the Buick, but not by much.
There honestly isn't much of a difference in gas mileage here, but if you must know, the BMW X3 is somewhat more economical than the Buick.
With respect to MSRP, the BMW X3 doesn't cost much less than the Buick.
Handling
With their similar turning circles, the BMW X3 and the Buick Enclave most certainly handle about the same into and out of tight spots.
Drivetrain
The Buick Enclave's engine is substantially more massive than the BMW X3's. Remember that bigger engines may use more gas than smaller ones.
Comfort
Taller drivers will substantially enjoy the extra head room in the Buick Enclave's front cabin compared to the X3.
The Buick Enclave provides more head- and leg-room to your passengers than the BMW does.
Warranty
The Buick and the BMW X3 have the same basic after-sale protection.