Ribble Titanium vs Ribble Steel vs Argon18 Alloy

Argon18 (Alloy)
Ribble Gravel (Titanium)
Ribble Gravel (Steel)

As the the title says, I can't decide between these bikes. They all come with the exact same groupset, except the 42 front teeth on the Argon18 vs 40 on the Ribbles.

I will ride the bike mostly in the French Alps, in mostly sunny weather.

My gut feeling would say go for the titanium, even though I know there wont be any difference, but I would have to fly to UK to family and order it there, which is a bit annoying.
The Ribbles also come with more tire clearence (45 vs 40). I have mostly ridden road in my life and not sure how much I will feel that difference.

Apart from that, I dont really see much of a difference. Maybe the Argon looks more aggressive, but hard to say without trying it.

Price vice the Argon and Steel would cost the same and the titanium 500 more.

Thanks in advance and appreciate any input.