Flash vs. WebDynpro
General aspects to consider
- Are the end-users of the application allowed to install/use the flash player? No --> WebDynpro
- Do you need extensive resizing possibilities due to large forms/tables? Yes --> WebDynpro
- Do you base your application on many different data sources? Yes --> Flash
Connectivity
WebDynpro only supports Webservices as datasource.
See also note 950492
RFCs
However, if you uncheck mask unsupported features under Tools -> Options, and then deploy, BAPIs will also work to a certain extent.
Horizontal Scrollbars
Flash has no horizontal scrollbars
Wed Dynpro allows tree option within the tables which is supported in Visual Composer.
Popups
WebDynpro does not support popup windows
Layers
WebDynpro only supports None and Wizard
(Check also this Thread)