Completely different beasts, Deluge could probably do some similar sounds to A4, but they would be nowhere near as dynamic, way less modulation options.
But it sounds like you want a multitimbral polyphonic synth, rather than a 4 voice highly modulatable analog synth, which the Deluge can do.
The synth engines on the Deluge are a little limited when compared to a full blown synth, but they are perfectly capable of most types of sound, especially since the community firmwares.
I have both and really like both.
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