Whether it's a crossover based on a truck or car platform makes a difference. My girlfriend's crossover is on a truck platform, and handles like one. We recently test drove a newer crossover built on a sedan platform, and it drives more like a sedan.
That's probably right. In which case it's comparison between "small SUV" and "crossover". I think the Lexus RX may be the former, unless they changed the platform from her 1st gen RX.
The RX is based on the Camry. AFAIK, the only small SUVs based on truck frames are the Xterra (Nissan Frontier frame) and the FJCruiser (toyota Tacoma)