instead of having to dig through pdf's on that page - which imho does not really help the original question -
quant analysts are a broad description of someone who works with mathematics and other quantitative techniques to make decisions. "quants" typically
work to support the traders by developing models, providing pricing for products and in some cases, develop the platform and systems/models to deal with advanced trading strategies like statistical arbitrage and other algorithmic trading strategies. you'd need to have a quantitative background to begin with, e.g. degree in mathematics, physics, computer science and many positions now require a PhD in a similar subject.
on the other hand, a trader is someone who typically makes the decision on whether or not to buy/sell a particular product based on informed decisions. These decisions can be self made and/or with the support of a quant analyst. traders are responsible for making money from the trades they put on whereas quant analysts (unless they are responsible for developing the trading strategies) are not. traders will come varied backgrounds from liberal arts to finance to mathematics but will normally need to have a decent understand of fundamentals (economics, markets, etc) in order to start out.
In terms of career and pay, i can only speak from the point of a trader, but in general, the path of a trader will start as a junior trader, working their way up within a bank or a fund of some sort, eventually running your own portfolio. because a trader has a role in P&L generation, pay is normally a % of how much you make and is on top of a basic salary which would rarely be seen below 6 figures unless you are just starting out. on the other hand, i believe that if you work as a quant in the 'back/mid office' developing pricing models and working in risk management, remuneration is normally a fixed sum with a bonus that is a % of your basic salary as opposed to any sort of P&L. Whereas if you work as a quant in a stat arb shop for example, the pay structure can be a % of the P&L.
michaelpage has a rough salary guide: here
hope this helps.