TBH TI-89 titanium is a better engineering calculator since the UI is way better. I have both a HP50G and a TI-89 titanium and I've done way more useful engineering work on the TI-89 titanium just because it's so much easier and accessible. Also of course, BASIC is a lot easier than reverse polish lisp for making some quick scripts.
Also I will add, there are known symbolic math issues on the HP50G due to the CAS system it uses. I will see if I can find a link.
Also I will add, there are known symbolic math issues on the HP50G due to the CAS system it uses. I will see if I can find a link.