Questions about HP 15C Collector’s Edition

Does the Collector's Edition of the HP 15C offer noticeable improvements over the Limited Edition, especially in terms of build quality and the included protective case? Do all the keys have a firm fit and a good pressure point? And is the protective cover still made of the cheap, short-lived PU known from the LE or is it once again made of durable vinyl like the original model? Many thanks in advance for an assessment.

Note to the Digitec editorial team: The title of the article should be changed. HP15C is a technical-scientific calculator and not a financial-mathematical calculator (financel calc). A financial mathematical calculator is, for example, the HP12C.

Good evening :-) Are the keys really as bad as übersll reports? My old HP-41 and HP-69 are still working perfectly. Just asking for sentimental reasons, as I used one of these after my training (o;