According to the SE catalog, any of the injectors can be used with the ETC throttle body.
"SCREAMIN’ EAGLE® PRO HIGH FLOW 58MM EFI THROTTLE BODY – ELECTRONIC THROTTLE PART # 27713-08
Just add your stock injectors or the Screamin’ Eagle Pro High Flow Injector Kit P/N 27796-08 or 27797-07 (sold separately)."
The 58mm cable operated TB, however, only mentions using the stock injectors or the 27797-07. 
Jerry
I'm reading from the 2010 SE parts catalog and it clearly states that the injectors P/N 27797-07, that deliver 4.9 grams/sec are to be used with throttlebody P/N 27639-07. This throttlebody P/N is for the
cable operated pro high flow 58mm EFI throttlebody.
The injectors with P/N 27796-08 that deliver 5.3 grams/sec specifically state they are to be used with throttlebody P/N 27796-08. The throttlebody with this P/N is the
Electronic Throttle SE Pro High Flow 58mm EFI Throttlebody.
Seems clear to me that the smaller injector is for use only with the
cable-operated 58mm TB and the larger injector is designed to only be used with the
throttle-by-wire (electronic) 58mmTB.
Just follow the part numbers (all on the same page) and it'll be clear to you. Hope that helps.