The Explorer offers optional seating for 7 passengers; the RDX can only carry 5.
The Explorer has 48 cubic feet more passenger volume than the RDX (151.5 vs. 103.5).
The Explorer has 2.7 inches more front headroom, .9 inches more front legroom, 1.6 inches more front hip room, 2.8 inches more front shoulder room, 2.5 inches more rear headroom, 1.2 inches more rear legroom, 3 inches more rear hip room and 3.8 inches more rear shoulder room than the RDX.
For enhanced passenger comfort on long trips the Explorer’s middle row seats recline. The RDX’s rear seats don’t recline.