That pretty much sums it up. I'm a Marantz fan myself. I just prefer the house sound of the early to mid 70's SS Marantz gear. This may ruffle a few feathers, but to my ears the '75 to '79 Marantz gear was loosing that original Marantz house sound. I had collected and restored various Marantz separates from '71 to '76, and after '74, the overall tone started to change. Sounding more like other brands, like Pioneer and Sansui. I think the difference in sound between the two you posted would be the Marantz may sound a little warmer to your ears than the Pioneer. Both should sound good though.
Well a ford with a 428 and a chevy with a 427 the Marantz has the power...that is not enough to be noticeable. Edited per Robisme calling out the model number or the Marantz I was stuck thinking of the 2275 vs 1050 thread where there was a doubling of power for the Pioneer.
Well a ford with a 351 and a chevy with a 427 the Marantz has half the power...that is fully three dB out of the speakers. almost enough to be noticeable.