Hiya
@jacksimmons I think V3 is the best mix and has the best balance
To be fair the mixes sound very similar to my ears on a first listen
It is impossible to tell what they were mixed on - but where is the fun in that...
If I had to guess (and give a reason)....
V1 was mixed on the Speakers - my thinking is that this version has the "weakest" bass, which is notoriously difficult to mix on smaller speakers
V2 was the headphones & speakers - my thinking is the stereo field sounds a bit more balanced and detailed
V3 was mixed on headphones - my thinking is that hearing your vocal so direct made you turn it down a bit
This is all a complete guess
I think you have done a great job with the mixes - in all cases I think you need a "stronger" bass. A combination of a stronger actual sound and then mixing it a bit higher in the mix would give a stronger foundation to the track