Look inside
I have thoughts about your choice of caliber involving the volume of the cartridge vs the volume of the barrel not giving a lot of room for acceleration, thus wasting a lot of the cartridge's potential. But I will spare you them. Just go to the web site "Ballistics by the inch" and research.
I have Rugers. I chose them because they are strong. Not only the frames and the cylinders, but the internal parts.
I suggest you take the sideplate off the Taurus and drop the trigger group out of the Ruger, compare the parts and evaluate their strength. Of course, that is not possible, but if you can ask a gunsmith who has worked on both, you might get some good advice.
I believe the Taurus is lighter than the Ruger. If you intend to carry a lot, that might "weigh" in on your decision process.
Unsolicited advice: If I wanted a short-barrelled 454 Casull, I would get a 7.5" Ruger and have it cut back. Magnaporting would then be an option and the ballistically useful barrel length can be selected to your satisfaction. If you ever want to add an optical sight (scope, red dot or whatever) to the gun, the Alaskan does NOT have the scope mount scallops.
If one don't like the red stripe on the Taurus grips, what keeps one from simply (permanently) staining it black?
Lost Sheep