Hi guys , i can explain the differences between all the meters as i manufacture all the versions that you have talked about .
all the meters are manufactured in our factory in asia. the main difference is in the main board of the meters. market places are not the same around the world and some countries require different spec in the hardware. thinks you need to consider:
warrentee
spec required
component quality
regulations on spec dictate how good the spec needs to be in various countries. with europe needing Rohs meaning lead free solder manufacture
accessories. only the digipro brand comes with a full package of support and accessories including a power inverter car charger.
files are big issue when using the meter, you need to have the files for the coutry or satellites you are working with .
digipro also have 8 way diseqc switching USALS and motor control .long life battery and more exspensive components.
I could go on and on about the spec , the choice is the purchaser when they buy , but normaly there is a reason for price variations
should anyone want more info , please post and i will answer any comments.
thanks