The best heavy truck I have used is the one I posted. It is OE software and yes they are all different to navigate. I have a couple nexiq units that are "fully loaded" as I am a test sight for them. They will cover most medium and light duty trucks fairly well with a good amount of data and bi...
If it is 9 pin round yes. It has the mack and Volo software but not sure how new you are referring to. Do not work on too many of either in my shop mostly cat, cummins,international, and one fleet is switching to Detroit and Paccars so just starting to see them.
http://jcdieselcomputer.com/
I just bought a laptop last month from them. So far everything works great. All OE programs. Will not do light duty only six and nine pin round.
Autel. I own the maxidas 503 and it has been a great scanner. Bought it to replace my mac/ otc genniss night and day better. "Road testing" and autel maxisys pro right now and love it. For the price no other scanner compairs in my opinion.