The AjamSonic upgrade covers this concern by adding new voices wtih new articulation(VCE-2 which is Ketron's new Voice Character Emilation technique).
These new voices are also incoorporated with the new styles too (new demos soon to be released).
However - interestingly many admit the Ketron styles are some of the best, but the lead voices are not. These same lead voices are what are used in the style too ~ so ... what makes the Ketron styles great?
Thanks