You have a lot of work with that.
Yes, the First 40 and the Centurion 40s belong to the same "way" of designing a fast boat. If you look for instance for a Dufour 40e, you will find more beam and less ballast.
The Centurion 40s is a great and fast boat, specially for cruising even if it can do also well on club regattas. A fast cruiser with a good interior.
The First CR you have posted is a slightly more powerful boat than the Centurion, with more ballast and more righting moment even if has a bit more weight. The profile of both boats are very similar but I doubt the entries and the bow design at the water level are the same. I think the First is more narrow and has slightly narrow entries.
But the First you see winning races is not the CR 40. The CR40 is a (failed) attempt to sell the First 40 as a cruising boat. It is only on the market since last year and has many differences to the true First 40:
the "fast" First has a cored hull (the CR is monolithic), it weights less it has a bigger mast and a bigger sail area (99m2). The racing main has 56.3m2.