Which one should I get a 7900xt or 7900xtx

I was researching on the 7900xtx gpu I decided to compare it with the 7900xt and I realized both them almost have the same amount of vram like the 7900xt have 20 while the 7900xtx have 24 so I was wondering should I get the 7900xt now or just save up for the 7900xtx instead or get the 7900xtx if I want to upgrade in the future