Will the parts be under any sort of load / strain?
There is some creep, over time. I made a replacement bracket for a keyboard tray out of Tough v1 and it stretched quite a bit after few days installed. I did a new one in Standard resin and it’s kept it’s dimensions much better (it’s been in service several years now). Note the part is under a moderate amount of force, and there have been significant improvements between Tough v1 and the current Tough v4. Regardless, last time I checked Formlabs doesn’t recommend Tough for static loads, and it’s still (in my opinion) nothing like a practical replacement for ABS.
I’ve been really impressed with Rigid, especially for chunky parts. I have a variety of brackets printed in Rigid which have been hanging for several months, again under load, and I haven’t yet noticed any significant deformation. If you want to minimize long-term creep, that would be my go-to. Note it’s not recommended for moving parts that will rub against each other. It’s also one of the most brittle resins (we tried using it for small models but tiny bits broke off too easily compared to Tough).
I’m told Grey Pro was engineered to minimize creep over time, so it might be worth a look as well.
I haven’t used Durable. While I hear it has the best impact resistance (great for stuff you’ll drop) and resists wear and tear, I don’t think it’s optimized for dimensional stability over time if your parts are under any sort of constant load.
I’ve come to think of the Formlabs resins as a spectrum of stiffness / brittleness vs. flexibility / droopiness. That’s an oversimplification that will probably make some of the engineers groan but it works for me.
Here’s a brief summary of the engineering resins: https://support.formlabs.com/s/topic/0TO1Y000006mfNrWAI/engineering-resins
If you go here, then click any of the links under Engineering Resins, it tells you in more detail which applications are recommended / discouraged for each: https://support.formlabs.com/s/topic/0TO1Y000006mfMdWAI/materials
The interactive chart at the bottom of this page might be helpful:
A blog post discussing various metrics referred to in the chart:
Hope this helps.