Your right, the Delcam portfolio of products can seem rather daunting at first but this is due to Delcam's belief that a single piece of software can't fit every customers needs.
This does mean that there is some crossover between the products and some shared ground and in some instances there are 2 Delcam products that could solve a particular customers needs.
Bart Simpson, the commercial Directer of Delcam explains this quite well at the IMTS show to MCADcafe, the link is here:
The link below gives a short description of most of the software, if there is anything else you need to know feel free to ask.
Delcam’s Power Solution CADCAM Software