I'm not sure if the TFE series replaced the TP series or if it was the next step up from the TP.
Price and weight should be pretty good indicators of quality within the same company (unless there is an obvious explanation for the weight difference - but usually for speakers weight means heavier drivers or heavier cabinets which are both good thing)!
However, more than anything, I am basing this on
@zieglj01 's direct A-B comparison of a TP160S vs TFE60 (the bookshelf version of each) earlier in this thread where he said the TFE was definitely the better speaker!
I have been reading Zieglj01's post for over a decade, and I completely respect his judgement (by verifying his comments on those speakers he has mentioned that I have also heard).