For instance, some drag racers sample EGT's 100 times a second, but the truth is that the thermocouple physically can't change temperature that fast. On the other hand, you need 100 samples per second or more to measure shock absorber velocity. That should be fine for everything except suspension motion during the launch. Because the race is longer, you need either slow sampling rates or a lot of memory. This high rate is needed partly because shock position data is differentiated in the software to get shock velocity.
Comparison shopping is smart.
Things change very fast in this business, and of course there are different opinions, so we can't answer all your questions about the other brands. With some systems, you're stuck with a fixed sampling speed, or certain channels can only be used with certain sensors, or you can have only 8 temperature measurements. With some brands it can be very expensive if you decide to add something on later. With the Corsa system, you can set the sampling speed for each channel. The Corsa system is designed for amateur and pro teams where cost and ease of use are part of the question.