Hopefully Kevin will add some comments here as well, but here are the main differences that I know of:

1. Visual FoxExpress includes a complete user interface that you can use in place of or in addition to the project manager for building applications.

2. Visual FoxExpress extends the data dictionary with DBCX and includes a rich set of objects that interact with DBCX properties.

3. Visual FoxExpress doesn't require you to hand code data environments in adataenv.prg.

4. Visual FoxExpress uses the standard VFP menu editor and GENMENUX to create menus based on classes whereas The Mere Mortals Framework uses menus actually created in .VCX files.

5. Visual FoxExpress business objects take a little less memory than Mere Mortals do, but in some cases the Mere Mortals business objects are more flexible when creating parent/child forms.


I don't know of anyone that's done this yet, but because both products are based on Codebook they could be used to complement each other, IOW, you could use VFE to build the app and VFE's classes where appropriate but you could also plug in some of the MM classes in places where you think they're more suited to something you're trying to accomplish.

These are off the top of my head. I'm sure there are others as well.