The SigLite tablet is based on touch-sensitive technology, while all of the Gem-Series products are based on high-performance high-speed electromagnetic pen and sensor technology. The differences between rugged E/M technology and the less durable touchpad type technology will determine which one you should use, as their signature capture performance is identical. If the price were the same, the electromagnetic Gem-Series tablets would always be the tablet of choice. However, because SigLite's technology is less expensive, it allows for cost savings in an environment where extreme ruggedness is not a major requirement. This is because the number of signatures it can collect is limited by eventual incremental wear to the sensor surface. Lifetime for SigLite is typically about 100,000 signatures. Also, if the SigLite touchpad were to be unpacked and packed frequently in the field, you will run the risk of accidentally scratching or cutting the thin touchpad surface. The SigLite SL model features a special protective hinged cover for field use and is an exception to this risk. The Gem-series tablets are best used in applications where the volume of signatures is very high or the pad is exposed to the public, where it might be misused. Gem-series products are also exceptional at recording signatures through paper without any loss of accuracy, making them a great choice where simultaneous inking is desired