Well why not. It’s not like it’s confusing already or anything.
Let’s begin by summarizing. There is the historical Castle Dracula, the ruined fortress at Poenari, which holds the best claim to being Dracula’s Castle since, y’know, it actually WAS. Oh, but then there are those who insist on drawing a demarcation line between the historical Dracula and the fictional vampire Count largely created by Bram Stoker. Okay. So we then have the fictitious Castle Dracula, which doesn’t really exist, but if it did, we know WHERE it would be located; it also MAY have been inspired by Slain’s Castle in Scotland. Castle Bran, in Romania, likewise MAY have inspired Bram Stoker, and the Romanian tourism department will be quick to tell you that Bran is the “real” Castle Dracula although Dracula, the historical Dracula, may never have even set foot in it. (He probably did, but it can’t be proven.) Then there’s Hunedoara, aka Corvin Castle, which looks perhaps the coolest of all and is located in the proper geographical setting, but was the castle of the Hungarian king, not Dracula (although Dracula was held prisoner there).
I’d never heard of Vlad Tepes Castle in Bucharest before, surprisingly. It was constructed in 1901 to pay tribute to King Carol I, but when his highness didn’t care for the design, it was altered to look like the ruined fortress of Poenari. It’s hard to tell from looking at the ruins of Poenari today; is THIS what it looked like during its prime, when Dracula resided there? Parts of it look right, but other parts look way too modern.