I see you have not had much response to you query.
Firstly I must say that I've never used 'desktop' as we have vCarve pro (shopbot edition)
There have been similar pro vs desktop posts here.viewtopic.php?f=2&t=27026
vcarve pro vs desktop - V Carve Pro is about double the price and includes some additional features that are more apt to a production environment (such as part nesting). The main difference is that VCarve Desktop is limited to a 24×24″ work area, which is perfect for most of our machines.https://www.vectric.com/products
Which do I choose, Desktop or Pro?
24" x 24" work area limit
No Nesting/Plate Layout
No Toolpath Templates or Merging Toolpaths
No Gadget Scripting/Automation
No Job Set-up Sheets
No Size Limit
True Shape Nesting
Job Setup Sheets
I'm not sure what special features you require for a laser.
Sincerely and in good faith