Actron scanners

[Frodo]

I am looking at a couple scanners, both made by Actron, that have fairly similar capabilities. One, however, "Displays modes 1-9 of global OBD II data". I'm new at this...what does that mean, and how important is it??

Also regarding the Actron models in general, what's the difference between the CP 91xx series and the CP 95xx? Are the 95xx just newer versions?

I've heard people tout the CP 9125 as a simple code reader from which one can then get online and find the additional info about the code (and the means of fixing the problem). This would be a tempting way to go, but from the descriptions I've read, it does not display "manufacturer specific code definitions." Is that not important? Are these what they call "enhanced codes"?

Thanks for any input.