Cinelli Hobootleg Geo? If so, which version?

So I've been looking around for my next bike. I have a carbon road bike for training as well as an old steel racer that I ride around the city on nice days. Also I have an old Cannondale City bike, but the frame is too large and it just doesn't bring me joy anymore.

New bike shoul thus serve as both a bad-weather city cruiser as well as a seriously gravel-capable bikepacking rig, that lets me explore the Swiss alps (where I live) as well as the rest of europe and potentially central Asia. While most people would probably buy some fast gravel racer with 1-by shifting and hydro brakes these days, I am not so convinced that would suit me: I want a low maintenance, no-bullshit bike platform that is not so expensive that I faint when I drop it: Steel frame, mechanical shifting with a range that gets me uphill when loaded up. Ideally mechanically actuated hydraulic brakes like TRP's since I'm a bit traumatized by leaking hydraulic cables. All that below 3000 bucks ideally.

First I looked at the famous Salsa Fargo, then at the Kona Sutra LTD. Both nice bikes, but both with Hydro Brakes and really not the best availabliity in Switzerland – and since US and Switzerland are by now basically in a trade war, I don't expect this to get any better soon.

Now I stumbled onto the Cinelli Hobootleg Geo and fell in love. It just ticks ALL the boxes and can be found in Europe discounted to around 1500 bucks – so I'd even have plenty money left to upgrade it to a SON Dynamo Lighting/Charging solution – nice! Geometry is nearly identical to a Salsa Fargo.

HOWEVER – and this is messing with my head – they have two versions:

This beautiful orange one they call the "Tiagra" version and this white/green one they call the "GRX" version. In both versions however you get Tiagra shift/break levers (because of the mech brakes) to operate the 36-26T front and 10/11-34T rear gears. Front derailleur is a Microshift FD-FD-M612-B for both.

There are – apart from the color – really only two differences I can see:

• The rear derailleur is either a Tiagra ST-4700 or a GRX400 (with clutch)
• The wheels are either Shining DB-30 6 Bolt (for the Tiagra Version) or WTB ST i25 TCS 2.0 Center Lock (for the GRX Version).

Why would Cinelli offer two versions of a bike that are so close together? Normally manufacturers spec their bikes rather far apart to distinguish them, but here its almost the same bike with just about 100 Euros difference? Am I not seeing some huge, obvious difference that sets the these bikes apart?

I have thougth about reparability (Tiagra being available abolutely all around the wordl, while GRX maybe less?) and also centerlock rotors not being as common in remote areas as 6-bolt might be. But maybe I'm overthinking this?

On a technical level I lean towards the GRX for its clutch – but I really like the colorway of the Tiagra one much, much better. Should I just buy the pretty orange one with 6-bolt wheels and slap a GRX rear on it (if thats even possible)?

Which bike would you choose? …or would you suggest another bike alltogether? Do you have hands-on experience with the Hobootleg GEO?

Any and all inputs are most welcome.

Thanks in advance!