I am taking an electronics for telecommunications class in my senior year of my undergrad engineering degree. Our teacher said we'd be checking results using Cadence's Orcad Pspice. I find the newer Pspice versions a little confusing and difficult to work with so I asked if I could use TINA-TI, which I used for circuits using transistors in previous courses and found it just fine, but our teacher said that some simulators have less accurate models for high frequency and he would rather I use PSpice so all of us have the same results. I've looked a little bit into it (Comparison Between SPICE Simulators) and all of them seem to have the SPICE base, so I guessed I wouldn't have any problem.
My question is: is that really true? What are the models and differences between simulators? Is there an upper frequency limit for TINA-TI where it starts misrepresenting circuits? I remeber reading there is a way to include your own modeles, is that true for TINA-TI?