Invest in UC or RTM within 6-10 months

Dear All,
Need a expert advice between two options, I am bit confused.

1) Almost RTM within 8-10 months 5400 - 5600 inclusive of everything, I am getting from BUILDER directly
2) Resale for the same flats, I am getting in 4500 - 4600, but with better choices

Constraint: Currently, I dont have so much margin money to buy resale becuase premium is very high

I am trying to understand, shall I wait for one year and than buy a resale property in Noida or shall I @least invest in Noida Extension, to get an appreciation.

Please advice.

Thanks,
Vineet Prakash