My dad considered a cologne engined Scorpio when he got his 24v Senator. Needless to say that idea didn't outlive the respective test drives.
The last 24v Scorpios could shift though if you could stand the looks
You have to compare like with like: a 12v Scorpio compares OK to a 2.5 Omega. A 24v Scorpio matches a 3.0l Omega unless you want a manual gearbox which weren't available in the Ford. The 4 cylinder cars are similarly comparable. There is no point comparing a 2.4 Scorpio with anything, as nobody bought them(V6 running costs with 4cyl performance guaranteed that from the start). 4WD was Ford only if that matters to anyone.
A Scorpio has more rear leg room, and the hatchback makes for an enormous boot which is why you rarely saw the early saloons. Ford's decision to only make the later cars as a saloon was very strange. Omega and Scorpio estates are equally useful. Both cars suffer from strut front suspensions that wear out bushes, but the Ford is cheaper to sort and the non-adjustable suspension causes fewer issues. Ford's weak 4speed auto and rust prone arches/floorpan easily make up for that. The Omega facelift improved the car inside and out, but the Scorpio facelift is still hard to understand 20 years later. Both cars are similarly comfortable, quiet and effortless cruisers that personal preference was hard to justify rationally. The Omega's extra five years of production mean that today it is still easy to find a good one.