If you're using a pump to sparge, I see no reason to not use it to vorlauf. If you're not, I'm of the mind that it's "one more thing to clean" and would just use the pitcher. But, I'm lazy.
One thing that is just about time savings, and not technique- there is no reason to rest at mashout temps. If you're at mash out temps, you can just vorlauf and sparge- there isn't any reason to rest for 10 minutes first.