Nvidia RTX 5070Ti versus Radeon RX7900XTX

Quick question. I'm in the process of speccing a new pc and have the option of the Nvidia RTX 5070Ti or the Radeon RX7900XTX at roughly the same price point.

The Radeon GPU has 24 gigs of VRAM versus the 5070Ti's 16 gigs.

How big a deal is the extra VRAM when it comes to DCS? Enough to swing it despite being an earlier generation of GPU? Is there some other card I'm not considering which would be superior to either (at the same price point)