That is a difficult one. Both are great revolvers. Is it for carry or home/range? The Taurus Tracker 44 is awesome. I also like the BFR revolver 45/70. The 454 might have too much kick for excellent accuracy.
That is why I sold my Desert Eagle .50 AE. But if you are young and strong,plus a good pair gloves? Is there a big price difference in ammo and/or maximum size in the bullet grain? Check out www. ammo-seekcom for ammo prices, and bullet grain weights. Also Guns for Sale | Online Gun Store | Grab A Gun Online Gun Store for gun prices. Good luck on your purchase. Both are very powerful cartridges. I also regret selling my .44 Mag D.E.. But I have several AKs with folding stocks to make up for that and better for longer shots. .22 cents versus $2.00 or more per round.