Ok, answering my own question. It seems that the answer is… It depends.
I have been researching this, and I thought I would share my findings. This is lengthy and not necessary of interest to all. I think our group will probably start with KoBoCollect due to its simplicity. However, we will look at both as we continue to learn about the product. We are looking at a possible 30 page questionnaire - and it seems to me that this will be much better using Enketo. So, here goes…
The definitive reference for Enketo and KoBoCollect functions in XLS Forms is maintained by XLSForm.org at the following web site: http://xlsform.org/en/ref-table/ In general, there are very few functional differences in the functions allowed on the two platforms.
Name and password
• The default is to allow data entry by anyone using a web browser as long as they have the URL to the form. This URL is obtained by Form > Collect data > Copy.
• The owner can also “Require authentication to see forms and submit data”. This is a global setting for all forms created by the owner. In this case, use of the above link would require a username and password.
• You can also direct the user to a link through KoBoToolbox. The link is shown in Settings > Sharing > Share by link, and it requires a username and password. You are then taken to KoBoTool box, where you go to Form > Collect data > Open. This is also where the user can see or modify data, depending on permissions. Subsequent use of this link may not require re-entry of username and password. (TBD).
• Server name, username and password are all required.
• In addition, “Form metadata values will be added to forms that have username, email and/or telephone preloaded fields to identify the person submitting the form.” Fields in KoBoCollect are as follows:
o User defined
SIM serial number
Some, but not all, of these fields can be specified in KoBoToolbox > Form > Edit > Layout & Settings > Form Style. This would add additional levels of authentication when reviewing data. (Note that the Username will display if authentication is required for viewing with Enketo.)
o This style will display correctly in Enketo.
o Although you can build your survey forms in KoBoToolbox with grid-theme style you are not able to collect data using the same format in KoBoCollect
Skip logic inside of a Group
KoboCollect: There is a bug that does not allow skip logic questions to display without having the form refreshed. There is a workarounds involving displaying the second question outside of the group, but this is not ideal.
Enketo: Skip logic inside of a form works correctly.
KoBoCollect: Settings and prompts are supported in many different languages. This may be a significant advantage for some organizations.
Enketo: A multi-language user interface is in progress. Currenly the labels are in the language of the browser.
KoboCollect requires navigation using one of the following:
• Horizontal swipes
• Forward/backward buttons
• User swipes and buttons
This adds many “touches” to navigation, which can be significant in a longer form.
Enketo uses a single scrolling form.
Both KoBoCollect and Enketo allow editing of draft forms.