track and bearing vs. course over ground and heading vector

track and course over ground are similar. Course can be a compass, magnetic or true heading. i.e. you might say my course over ground is 230 degrees true. But you wouldn't really say my track is 230 deg true. Can but not really! Track is many times referred to as past history but not necessarily. Your history track might be refer to the series of tacks and turns you made overlaid on a chart. You could still call this the course you made over ground but track is more typical. For the most part they are interchangeable. Bearing is specifically a direction to an object. e.g. the light house is bearing 120 degrees magnetic. Heading is specifically reserved for the direction your boat is pointing towards. e.g. My heading is 190 degress true - which is usually not your COG or track because of current and leeway.

So track would take into account current drift?

Absolutely. Track is the actual path that you took as you were being pushed by current and leeway.