There should not be a difference in motor life. The only difference is that the windings are wired in parallel for 115v, series for 230v, but the windings receive the same amount of voltage and current in both scenarios.
As for money savings, there will be a very slight efficiency gain by running off 230v, but when I say slight I mean very slight... maybe a percentage point or two. It's a common misconception that running things off the higher voltage saves money on electricity, but electricity is billed by wattage, which is not dependant on amperage nor voltage. Where it makes sense is when the motor is so large that running it on 115v is not economical because of the size of wire that must be run to the motor, but that doesn't apply in the case of a Sequence, which has at most a 1/2hp motor.
The tiny bit of efficiency gain you reap is not going to be worth the expense and effort of running a dedicated 230v circuit to the pump, let alone the cost of the freakishly expensive two-pole GFI breaker that you'll have to buy.