Yes, the Roth 401(k) is permitted to be rolled over to your Roth IRA. Again you'll want to do that by direct rollover. If both are being moved at the same time, make absolutely sure that each rollover ends up in the correct account.
It usually make sense to roll the Roth 401(k) over to a Roth IRA, particularly if the balance in the Roth 401(k) is relatively small. However, it might make sense to leave it in the Roth 401(k) if that would provide better bankruptcy protection than in the Roth IRA or if your Roth IRA is has not yet met the 5-year holding requirement for qualified distributions.
