Utility
The Buick will most definitely prove more convenient than the BMW X3 for those of you with frequent child-cargo.
The BMW X3 outpulls the Buick Enclave by a massive margin.
Dimensions
Your wallet will hurt more every time you fill up the Buick Enclave than the BMW X3 because of its bigger tank.
The BMW and the Enclave compete for the same parking spaces.
The BMW X3's shorter wheelbase will give a more agile feel in daily traffic. On the other hand, the Buick Enclave is likely to have a smoother, more stable ride.
Convenience
You will definitely have to visit your friendly gas station more often with the BMW X3 than with 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 about the same to get the Buick Enclave to the dealership as the BMW.
With respect to fuel economy, the BMW X3 and the Buick Enclave don't differ much.
When it comes to MSRP, the BMW X3 doesn't cost much less than the Buick.
Handling
With their comparable turning radii, the BMW X3 and the Buick Enclave quite certainly handle approximately the same into and out of tight spots.
Drivetrain
The Enclave has a bigger engine than the BMW X3. Remember that smaller engines are often cheaper to fix, but a smaller engine usually has to work a little harder.
Torque equals pickup, and the Buick Enclave will have picked up and gone by the time the BMW X3 finally gets moving.
Comfort
Taller drivers will considerably enjoy the extra head room in the Buick Enclave's front cabin compared to the X3.
The Buick Enclave is not particularly roomier for your passengers than the BMW X3.
Warranty
The Buick Enclave and the BMW X3 have the same basic after-sale protection.