I don't think you can edit them separately. Sadly.
GG strongly needs to incorporate that HUD editing system FPSC-Classic had when you prepare your game for a compiled build. Its silly we have to back up the original file before we can make a change to what the HUD would appear like in the built game. If GG wants to be "the easy game maker" its going to need to help users out a lot more with simple tasks as such.
When the steam community says all the games look the same... this is one of the many reasons why. People easily familiarize with common huds.
On the plus side
Style Guru is coming along well though I must say. Maybe the developer will consider including in game HUD's as an option to edit too

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