Apologies. So, if you know both sounds, only you can decide if they are different enough to warrant owning both. When I compare two amps, I ask the same question. Sometimes, something about them is close, but maybe not everything. Example, the Custom 50 and Archon. Gain channels are similar IMHO, with the Archon having more gain, but the C50 having plenty. But the mid shift and other features the C50 has, may make it worth having for many people. The clean channels however, are different. And that too, may be enough difference for some people to own both. But, if you prefer the clean channel of one over the other and don't need massive gain, then you may only really need one of them.
I don't know the Orange amps clean channel enough to comment on how different it may be from the Archon. But the gain channel is the Orange sound and if you want THAT sound, then it's worth having both amps. If you want a Marshall gain channel, then something else might be better suited as your second amp, If you want Mesa... well Mark or Recto might be the "other amp" you want. It's hard to answer this question without knowing more of what tones you're seeking most, and what kind of stuff you're playing. So the best honest answer I could give you is that it depends on what tones mean the most to you. Orange amps are enough of "there own thing" that you should be able to make this decision, if you know how much you want that tone. But, it's not just "do I need two high gain amps" that would decide this. It's the tones of those amps.
