Interesting acquisition announced today....Blackberry to acquire Good Technologies. For those of you who don't know or are familiar with Good, it's basically a BYOD platform for enterprises. (Email, intranet, etc.) Not necessarily directly Sprint related, but many people use both.
I've seen some threads recently about the differences between SIM/UICCs and though posting a compatibility matrix would help people.
This is pretty straightforward. The matrix has every Sprint LTE device, and what UICC card is meant for that device. Mix and matching UICC card types probably will not work, but swapping around UICC cards for devices that use the same type of card should work properly.
Keep in mind, you cannot simply move your UICC card to another phone to use it. Sprint's device authentication system still requires the correct UICC and MEID to be on the account to authenticate properly and work.
Verizon now supports VoLTE devices with no CDMA including certain GSM/WCDMA/LTE iPhones. If you can set the Verizon SIM to LTE only you shouldn't have any problem. Non-CDMA phones on Verizon even get provisioned automatically to roam on ATT HSPA+ in several areas where CDMA/LTE Verizon phones don't, probably in anticipation of the CDMA network shutdown.