Gearing isn’t necessarily different on a tri bike, you’ll often find that road bikes of that price will come with a compact, as opposed to a standard chainset on a tri bike, but it’s not a gaurantee. Bazep is definitely right about geometry though, tri bikes are very twitchy and not nice to climb on, wouldn’t recommend unless the vast majority of your riding is tt/tri based.
You need to try a few ideally, fit is very important on the road, more so than on an MTB. Without getting into wild generalisations ti frames tend to be either light, or stiff, but not both, and personally a ti road bike would never be on my shopping list. The Focus is absolutely stunning value for <£900, that’s where my money would be going.