I don't have a VM'77, but do own a CV Jazz. I also have a Sub Ray 4WS that I got in trade. I have nothing negative to say about my Squier (it's my backup bass). The Sub Ray 4, on the other hand, just doesn't do it for me- I find the neck uncomfortable for my gigantic hands. I also do not like the sound of pre-amp. Lastly, I prefer a gloss finish on my basses. That being said, it's pretty well-made, and very affordable. In comparison, I had an OLP MM 5-string a few years back and absolutely loved it.
I don't know if you can get your hands on both in Puerto Rico, but if you can, play them both. You're right- your own hands and ears will be the best help in choosing.