Is the Adams 10.6 a completely different boat to the Adams 10 or the cruising version ?

Assuming you are talking about the narrow metre boat style Adams series starting (based on loa) with the Adams 8 then going to 10, 10 cruiser, then the 10.6 then for sure yes. That is, not the Adams 10.6 round bilge steel design. See this one here with diesel and folding prop.

www.boatsonline.com.au/boats-for-sale/used/sailing-boats/adams-10-6/310589

Sailed against the below well known example in Sydney west harbour for a few years - outboard powered. Very quick boat upwind and down.



sailboatdata here just original single spreader rig - seems like changed later to higher hounds and 2 spreaders

sailboatdata.com/sailboat/adams-106/

I own a Adams 35 the Cruising version steel

Masthead rig, shoal draft, skeg rudder, 30hp volvo, I used to have a folding kiwi prop now a fixed three blade prop drives the boat at 8knt.