No doubt in my mind. Leave the remaining mulch and leaves. I would gather all your other leaves and use them on top for more mulch, and if you like the look, this is all you need. If you don't like the look, use your preferred mulch on top to dress it up. The more organic material you leave/apply to your beds, the better. Lucky you with all those leaves. Any extras, start a compost pile! There are never too many leaves.

Anna

And if it is a large space add newspapers beneath the mulch to make the mulch last longer.The earthworms love it!

I agree, just stir up the old stuff so it doesn't form a mat.

Yes, leave the old and put the new layer on top. This is known as sheet composting.

Hey downsouth are you changing your name to "upnorth" ?
I know is corny what I just said but please indulge me.
For the topic at hand I agree with all the above but may I suggest pine needles as the top layer. They are very earth friendly and cheap.
Felix

I would love to use pine needles, wish they came in a bag. I have no way to haul or place to store bulk mulch. ;o(

Katkin I found them in a bale at Pinders in Palm City. I thought the price was high, but I purchased a bale. I wonder if Bushel Stop carries it?