Hi Rudi,
Yes, I see what you mean, an alternative head or two would help and I suppose a lot would depend on how you posed them within a scene.
My preference would have been for a mixed order of dress, as it makes figs more flexible.
They did remind me of some pics I'd stored away for future use lol, lol.
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A Pixie suit is a Pixie suit I suppose, so in that sense they would look similar, but with a little though they should still make a pleasing trio. I see some arm swoping taking place in my mind lol, lol.
The 2 standing chaps might well double as commanders too. I don't recall having seen any Pixie suit figures from Resicast before other that the 3 x 1/2 tank crew. I think I'd mix them in or separate the group a little, but it's hard to say until you try them out in a scene. For me placing figures within/around a vehicle/boat or whatever is one of the hardest things to do, but I see no reason why they wouldn't work well with the right amount of thought.
I do love the cooker and mess tins and I'm sure folks will find a home for them if the scene is right. Grouped together as they are for the picture does make the similaraties stand out though.
My thoughts anyway.
Al