Hey,
I was looking forward to hearing the vocal on this one.
I actually thought I'd commented back when I first listened but apparently not.
I thought the mix sounded great, fwiw.
The lighter guitar in the left side during the verse second half sounded a little too out there on it's own to me, but that's a tiny thing. Overall it sounded great!
The vocals - I agree with you and know what you mean.
The original vocals probably aren't much louder than what you've done, but they cut through better.
I'd want to boost the vocal highs a little and maybe cut some mud slightly - maybe a super wide gentle cut at 500 centre, or so?
I know the original pretty well. He sings the chorus an octave lower as well, then the two are panned apart.
You've been pretty faithful so far...Might be worth giving that a go.
Regardless, great job!
Edit: Probably telling you what you know but when I try to do a faithful cover I generally import the original into my session,
so I can quickly solo it and compare to what I have.
Flicking back and forth pretty quickly can sometimes shine a light on the main differences.