LOL, good luck getting an ultra narrow IRS in a publicly available, DOT legal anything.I was curious. So I priced out both vehicles same options.
Jeep 3.6 auto $60,395. $58,705 without safety features standard on Bronco Lux pack.
Bronco Wildtrak 2.7 auto SAS Lux $57,130
Of course a bare bones Rubi will be less than a full optioned Bronco.
IFS with sway disconnect has done everything the oem Rubicon can do. It actually gives more ground clearance up front. Of course once modified you are correct live will have more articulation. Then again once modified one can with a full long arm ifs like trophy trucks.