DLF's Golf Course Road premium needs serious scrutiny

Spent the whole Sunday checking out options on Golf Course Road. I'm currently in a 2BHK and honestly, thinking of upgrading to a bigger 3BHK or even a 4BHK. Already have a home loan, so this next move needs to be solid. I looked at DLF Royalton Towers, which is around 10 Cr, and also DLF The Crest, which goes up to 21.5 Cr. Both are completed. My main concern is the actual price per sqft. Is the advertised rate really what you pay, or are there huge hidden costs like PLC or other charges? Also, when you factor in stamp duty, registration, and ongoing maintenance, what's the total cost of ownership looking like? It's a big jump from my current place. Thinking long-term, which one do you guys think offers better appreciation over 5 years? Is that premium for The Crest really justified for an investor or even an end-user? What's the community's take?