Sounds like a backward move to me - but - to answer your question - some of the sensors are different and that may cause problems with the electronics - if you swap ALL of the 2.0 sensors over (which will probably mean swapping manifolds, etc.) it should work.
98 - 1.8 Mitsubishi Pajero iO
98 - 2.0 Suzuki Grand Vitara - SQ420
05 - 2.0 Suzuki Grand Vitara - JB420