Renderotica

If you're using the HD version of the figure with grafts it isn't going to work right, and it isn't a problem Vendors here can fix. But basically the HD morphs won't copy to where the Graft is, it is as if the morph just stops where the graft starts. So until Daz allows 3rd Party vendors to use the HD Character toolkit or whatever is needed, you have choice of the graft or HD Character being used, but not both at once. (You can use the graft with the regular version of the character, but you'll lose all the HD details) 

Usually a coloration difference is going to be due to shaders not matching ie Graft uses Iray Uber and character skin is PBRSkin or something along those lines. It can also be down to different translucency on character than graft. (I find it often happens to me as I add translucency after the Mat copy script was run, and it doesn't automatically update the graft when the translucency is changed on figure, so you need to run Mat Copy script after translucency is changed) 

As to one graft working better than another it is likely due to how or where graft connects and by chance it isn't as visible on HD effects. But I can guarantee there isn't a graft sold here that will work well with HD characters and Daz protects the HD Toolkit like it's a State Secret. (Basically the toolkit is only available to Daz PAs and the agreement is anything made with toolkit must sell through Daz, if Daz turns it down they can't sell the HD character elsewhere)