Analog invites you to turn up the volume

Lots of things can happen.  

@ghdprentice 

Thank you for coloring in your comments. I’m familiar with your systems, the main system is an amazing achievement. 
 

Best wishes to you and your friends and family over the holiday season.

@OP - very nice system. Differences in tonal balance between different sources may become greater at different listening levels. Perhaps the analogue source sounds smoother than the digital - that will be more apparent as the volume level goes up. Conversely, perhaps it is less dynamic sounding, encouraging higher levels in the search for more dynamics - though that's a fruitless pursuit. Lastly, maybe one was just reinvigorated by hearing the turntable having been away from it for a while, and surfing a wave of dopamine. It would be interesting to see if, playing both sources consistently and interchangeably the listening levels still vary or even out over time.

I think what @ghdprentice is driving at--and I agree-- is that what you are noticing is not universally true for everyone who has both digital and analog front ends. I, for example, do not find myself generally playing one louder than the other. I do find that each piece of music has a volume where it sounds best, and that seems to vary by engineering/ mastering rather than genre or media. 

You apparently have a system where one front end has characteristics causing the best sound to be at a higher volume than the other. I would not read into that anything inherent in the media. If you are wondering whether this suggests one front end is ultimately giving you better performance than the other, well, I think the simple answer is to ask which one you enjoy more when played at its ideal volume.  You might also consider which of these volume levels more closely matches a live performance. My guess is the louder one.

Think I tend to do the same thing. Crank up vinyl, not so much when streaming. 

At times streaming does have more detail, more of everything. But it can almost sound fake, at times compressed, of course fatiguing. 

Vinyl is like a warm blanket, you just get settled in, and enjoy. Will crank it up till the cartridge starts to pick up my speakers.  yeah, I need a better isolation for my TT.

There is another big difference, with vinyl, I sit, listen to the entire album. When streaming, it's a playlist, a station, or some mix. bitrates are all over the place, volume is never constant, soundstage, detail, dynamics are all over the place. Every song has it's own "flavor" it makes it much harder to stay in the pocket, disappear into the music. It's not as engaging or intimate. Think that is the reason, why vinyl wins.