I have a 1992 Vmax-4 with a long travel rear skid and a 1997 700SX (not an SRX I know)
Here is the easiest way I can describe the difference between them,
the SX is a point and shoot type sled while you need to man-handle the Vmax-4.
I like the way you have to work the Vmax-4 to make it corner, hot on the gas then a pinch of the brake to get it pitched sideways and back on the hammer (Wow what a rush) I guess that's why it's still my favorite ride and has over 21,000 miles on the odometer.
For the tight twisty trails the SX is less work but nothing puts a grin on my face faster than pulling the trigger of a 170 hp Vmax-4.
Just my .02