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Focusrite (Green) Voice box MK II before IAS Fireface 800?

Hi,
I apologize in advance if this is not the right place to post this.

I just picked up an IAS Fireface 800 firewire interface and am wondering if using the older (lower-end?) Focusrite Voice Box MKII for vocal channel strip/preamp (before the Fireface) would be a good idea.
This is for a home studio.

Focusrite Twintrak Pro vs Joemeek TwinQ

If I was to choose between the Focusrite Twintrak Pro or the Joemeek TwinQ which would be better for my DAW? I am looking for something that adds a lot of warmth, has low noise, and great quality that I will be satisfied for years to come. Also, which has better compression? Can both be routed back through to compress already recorded audio?