The rebound dampening that your low-end fork most likely lacks is going to be the biggest thing that you will notice immediately in any technical-riding situation. That is what makes any suspension 'real' suspension and not just a pogo stick on the front. It means the the fork will not recoil harshly from whatever causes it to compress and cause you to momentarily lose a bit of control. Look for externally-adjustable rebound - - this means you will be able to speed up or slow down that rate of rebound to suit your riding style and the conditions.