If you still want to consider only compression, then I would probably use the working law (or the definition of spring with SMAT → see above).
If you want a completely rigid connection, I would use the R-Link.
But as you can see, there are always different ways to solve your problem. Always try to look at the TEDDY output created and understand how the code works. In your example, you can compare the two Grasshopper commands by visualising the TEDDY output with a panel. As you can see in the screenshot, the difference is that they produce a different definition of the SOFiMSHC command SLNS. So look in the manual and compare the two inputs 
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