Both are entry level kind of receivers, so I don't know what you meant by "integrate it..." Also, both can be expected to have nearly flat frequency response in the audible 20-20,000 Hz range and distortions below the threshold of audibility. So, either can give you what you may call "warm sound" if you use tone control and experiment with the settings. Other than that, those who claimed the Marantz brand has a distinct warm sound were mostly just BS, or they heard it under certain conditions that gave that "warm sound" perception, but that would not be just because it was something Marantz's designers intentionally designed for such "sound". Yes, Marantz would say that, but that's just their marketing strategy, people bought into it and spread it over the years on magazines and the internet, proving Marantz adopted their marketing strategy to create the hype successfully.
My suggestion is, don't believe in such hearsay, try both and stick with the one you prefer, they may or may not sound much different in a blind listening comparison, but may sound quite different in sighted listening and the perceived difference would depend a lot on the operating conditions of the units, usage (type of music, how loud etc.), and how prone you are to expectation bias effects.
