Taxes in Little Silver are lower, just by a hair. Fair Haven is one of the very few towns that is going to have a decrease in the town's portion of the tax again this year, though.
That house assessed at $500,000 in Little Silver would have a tax bill of $11,095, in Fair Haven, $11,220. Keep in mind that that's for a house assessed at $500,000, not selling for $500,000. As you know, there can be little relationship between the tax assessment and the asking price. There are many factors why: Were the houses in town revalued last year or 6 years ago? Has the homeowner made improvements since the last valuation, etc.
The most recently published rates (2009) have Little Silver at 2.219 and Fair Haven at 2.244.
Here's a list of the municipal tax rates for Monmouth County