Music content and quality

I'm quite surprised to see that Denon's Heos does not support Google play music. I'm ending up playing my music from a tablet via bluetooth to my AVR. Now my question is, with restorer set to "low", would there be a massive gain in audio quality compared to lossless formats? This would be a pity, as the content on play music is really great. Internet radio sound quality is really terrible and find this a useless feature to be honest.