Well, if you already have a single template with the two views on it, why not try this -- each keep a copy of the form and work on your own views, then, when you are done, both save the form as source files (under the File menu), and replace the .xsl in the source files with the .xsl the other person worked on. Now, you'd want to make sure that the .xsl wasn't referencing any data connections that weren't already in the form, so you'd need to coordinate on that. And please note that you should test this first, after making only a few quick changes, to make sure it works. You should also make sure you've got a good copy of your form as a backup before mucking about with source files.
To repack you form up as a template after saving as source files, you right click on the manifest.xsf file, and select "Design". Once your template successfully opens in design mode, you can go to the File menu and use "Save As" to pack the files back up.
I suppose you could try copy / paste, since the form would have the same data source, and see if the controls stayed correctly bound to their data nodes -- but I've not had much luck with copying / pasting views between forms, so again, you'd want to test that. Also, you'd want to still stay aware to making sure neither of you were adding data sources the other didn't have.