Apples and oranges.
I prefer apples.
ST3 is better as part of a series. Genesis planet sets look like sets, though. Recasting Saavik was annoying (but it was that or no Saavik). But Mark Lenard was back as Sarek.
Temple of Doom is better as a stand alone movie. As part of a series it's a tad odd that Indy witnesses the power of the Shankara stones but seems unsure about the supernatural aspects of the Ark...until the end.
Kate Capshaw is horrible. Spielberg must've cast her because was really good at something besides acting...
Movie spends too much time underground, too. Seem stagnant compared to
Raiders. But still a better overall production than ST3.
Both films have decent villains. Tie.
Most memorable scenes:
Destruction of Enterprise vs. disgusting dinner (chilled monkey brains!).
Come of think of it, most of the memorable scenes in ToD were retarded. Sure Spock coming back was odd...(why does regenerated Spock stop aging?), but the destruction of the Enterprise was tragically awesome.
Winner: Star Trek 3, but marginally...