Do I need a matching driver-side hinge too?

Hood hinges wear in pairs. If you're replacing one side, the other is likely in similar condition. Plan on sourcing both for balanced hood operation.

Will my hood latch align properly once this is installed?

This hinge uses factory mounting points, so your OEM hood latch and catch will align as designed. If your latch was bent or damaged, address that separately.

Does this hinge weigh the same as the original?

Built to OEM specification, so weight distribution matches factory design. Hood balance will feel identical to a new vehicle off the lot.