SoftMotion Express VIs vs. Function Blocks

Hi,

Are there any differences between SoftMotion's express VIs and the function blocks? I plan to drive a servomotor via an NI 9505. The NI examples show how to use the function blocks, but I've been advised to use the Express VIs instead, to work around strange behaviour when using a simulated axis (http://forums.ni.com/t5/LabVIEW/SoftMotion-quot-Update-Buffer-quot-VI-refuses-to-take-more/m-p/2250854).

Thanks!