No, you don't get any money back on your taxes for buying a newer, more expensive home.
However, you can deduct Mortgage Interest, Property Tax and Mortgage Insurance.
Congratulations on the new home, though!
Here's more info on New Home Purchase.
You could get money back if you now have a large mortgage and thus paid more than anticipated interest during the year along with real estate taxes possibly paid on both properties. but the houses themselves offer no tax deduction.