The spectrum is what it is, but it's simply dependent on all the sounds that are present on the track.
If you only play a few notes at a time, then you will only produce a few frequencies and they'll show as 'spikes'. That doesn't make it wrong at all, it's 100% correct for that sound. Add in vocals and you'll get a different set of frequencies to add in, which will add some more spikes and start to fill in the gaps a bit.
That Sky Sailing track has vocals, bass and synth pads so it's a very full track, which will fill in the frequencies even more. And it's compressed and limited, which will squash the peaks so there's less dynamics to the sound,
So if you have a track with all the same elements, then yes you could get it sounding very similar. But with different and/or less instruments, then the frequency response you see will be different. So you need to compare like against like. If all you have is 12-string guitar, then compare that against another commercial track with just 12-string guitar, not against one with a whole load of other elements to them
You don't hear music with your eyes, so just use your ears to tell you what sounds good. If it sounds good, then it is good. Frequency displays on EQs can help pinpoint problem frequencies, but they can't show the difference between good music and bad music.
Having said all that, there are plug-ins that can help match one track's frequency balance against another. I believe the Fab Filter ProQ has an EQ matching function. But you need a suitable reference track with like for like instrumentation. Another mastering program is Har-Bal, https://www.har-bal.com/
which also has an EQ matching feature but can help get a more 'harmonically balanced' (hence the name) sound. But you still need to use your ears and not go by wavy lines on the screen.