Do all three types of Virto R Infinio have the same functionalities?

Realize that the bigger the aid the easier it is to press its buttons. With that aside, do all three versions of the new Virto R Infinio- In The Canal (ITC), Half Shell, and Full Shell - have the same features including same battery life? Or is there a trade-off when choosing ITC vs the other two slightly bigger models?

Also, is it also available in titanium? Didn’t see anything relating to it on their site.

Thanks!