I remember reading a post that someone figured the 60CX and 60CSX shared identical hardware and just slightly different software. This is seen in other products such as cell phones and such. Could it be that the 60CX has the built in Baro/Alt but just hidden with different software?
I doubt it, because the 60cx/60csx and 76cx/76csx all use the same unit software. I guess the best way to tell though would be to take apart two units and compare the guts of each.
I'll try find some pic's of units opened up!