AFAIK they are two different products. TC as you say is just a charting package, and the other is the navigation package. From what I recall all of the Jepp packages are expensive and unless you are planning on touring Europe widely, and going to lots of airports that require the range of Europe wide charts and or Instrument Approach plates, I'd go with SkyDemon or PocketFMS or something. These are much cheaper and more regularly updated with features and stuff.
I use SkyDemon and you can download AIP plates for free, or subscribe to a national enhanced package (like Pooleys for the UK). Personally I would only buy one of the Jepp packages for the Instrument approach plates, and even then I'd go in with a group of 3 others to share the cost.