Which track to start with; Ruby or Ruby on Rails?

Depends on if you want to be a Rails developer or a full blown Ruby developer. If all you know is Rails and the basics of Ruby, it'll be really difficult to do all of the more complicated tasks. If you know Ruby really well along with using RoR, you'll be able to make some truly dynamic applications with much less effort. But it all starts with Ruby.

Cheers. That's all i needed to know.

I'm currently doing the Ruby course myself, with an eye on following it up with the Rails course. I figured it wouldn't do any harm to at least get a decent foundation in Ruby first. It's turning out to be quite an enjoyable language to learn too (so far anyway!).

IMO the ruby track is unfinished. Search and do the ruby foundations course after you finish the track. There is content in there that is useful for understanding rails. The rails track is kind of "off" too, the ODOT course is way too complex, it seems to have missed an introduction course. I think rspec is too much at that stage. It can really knock your confidence trying to do this as a beginner. Come back to it once you have built a few rails apps under your belt. Just my 2 cents. Maybe search the other rail courses on here.

The Ruby on Rails track will teach you the Ruby you need to know to do Rails. If you want to get into Web development, get going on the Rails track ASAP--you'll learn the Ruby as you go and as you need it.