Please consider that the G3 variant is the latest and most advanced option that Ideas offers. This was launched in 2017 and is supposed to be the REFERENCE all across the RMS world. I attach a screenshot and a PDF document with more information you can share with the customer in case they have not read or heard about it. I find it important to read thoroughly on the IDEAs Website and get as documented as possible before they make a choice.
The G2 variant is the "classic" one and already quite advanced which has also been widely adopted by several Suite8 customers and has worked well for these customers.