There is a CAMM-ER datasheet on the
MBDA CAMM-ER web page, with pictures.
It says that it uses soft launch, same as CAMM. 190 mm diameter vs 166 mm*, but that shouldn't be a problem for Mk 41, as it's still a fair bit slimmer than ESSM. It should stlll quad-pack in Sylver. The Mk 41 SDL is 5.2 metres tall according to the manufacturer, but I don't know if that's enough.
The MBDA website doesn't mention a naval model, but there are plenty of mentions (e.g. in the
2013 annual report of Avio, a major supplier) of it replacing the Aspide SAM - which is currently fitted to 13 Italian navy ships, plus those of several other navies, as well as used in land-based systems.
*Not exactly the same missile with a booster. Looks as if the front & back ends are the same, but there's a slightly fatter section in between with some longitudinal fins.