Trying to make a purchasing decision based solely on features and technical specifications of products in the world of digital transcription is a bit like trying to judge a 'Cake Competition' based only on the ingredients. As you know, the best way to judge a 'Cake Competition' is to taste (experience) the cake yourself and then decide. The same principle applies while buying products related to digital transcription and dictation.
If you are already familiar with digital dictation and transcription and you want to quickly compare the features and benefits offered by one digital transcription product with another product that you are contemplating to purchase, you can quickly such for information from product comparison charts which can be found online.
If you have no experience regarding digital dictation and transcription, you might want to ask for some reviews and recommendations from your friends or colleagues.
If you are running a digital transcription office, you need to buy products which add value to your office. They should make it easy for your staff who would be trying to figure out what's on a tape during the process of transcription. But, please make sure that you don’t waste money on unnecessary products which add absolutely no value to your office.