Polar is a kind of LEO, at least if it’s low polar. The burn from LEO to Mars transfer will be about the same regardless of whether you’re coming from an equato

Polar is a kind of LEO, at least if it’s low polar. The burn from LEO to Mars transfer will be about the same regardless of whether you’re coming from an equatorial orbit or a properly-aligned polar orbit, so the added delta-v cost will be the speed of Earth’s rotation at the launch point, which you don’t get to use for a polar launch. In terms of dollars, if you’re flying on a rocket with enough excess capacity anyway (as seems to be the case here), it’s free. If you’re not, then you’ll need to cut your payload or use a bigger rocket, which would be extremely expensive.