I think solid copper gaskets are the better of the two, I don't think I am bias because I sell them,(not for A10s though), if fitted correctly there should be no need to replace, the sandwich ones were okay in there day but now with modern soft copper, which is now readily available lazer cut you cannot go wrong, in answer to whether the same gasket will work on an A7ss, yes is the answer but you may drop a slight bit on compression but nothing really noticeable. HTH
Regards TTJohn