Geo 3 is a joke. It'd be more monetarily efficient to go for a drone DX and and get literally everything the Geo 3 can ever offer for below half the cost ($425~DX, $525 if you want the OLED Drone vs $1300~GEO 3)
The empire vanquish is just a really ugly and bad luxe clone. It's just not worth the hassle or trouble to get a shoddy clone over a legit Luxe.
Your decision is basically just the Clone GTi against a Luxe.
At that point it's just personal preference.
Both markers are extremely equivalent in all aspects give or take a few values in some spots.
And in-case you've heard any shitty rumors about either gun, It's bullshit.
Clone is not complex in any shape way or form. Yes it has 20 something orings but they aren't weird sizes and only like 4 actually matter in the slightest.
Luxe does not have cold weather problems as long as you properly maintain it. I'm tired of people giving the luxe any complaints when it comes to the winter. Out of sheer spite for this type of complaint, I only bring my luxe out in winter/huge snow storms.
Every marker I've worked on with those types of complaints, was 99% user error or 0.5% orings or 0.5% battery problems; That includes luxes.
TL;DR It's really just a question of Clone GTi vs Luxe and they are both equivalent markers.