Scarlet maple is just another name for red maple.
The only cultivar I have seen with scarlet in the name is scarlet sentinel which if my memory serves me is a columnar with red leaves year round. I think it is part red maple and part either silver or norway. Find out what kind you are planning on getting specifically and maybe that will shed some light on it's growth habit and needs.

Red maple is a very popular tree, probably the #1 tree planted today. And there's a good reason for it.

Here is the link to the Nursery I am looking at. I will call them and ask details before I buy. I am still in the decision making stage.

Here is a link that might be useful: Fast Growing Trees-Scarlet Red Maple

I can't tell from the description on the website if 'scarlet' is just what they call the red maple or an actual cultivar name. The one thing you might want to ask is if they are seed grown or clonally (vegetatively) propagated. The clonally propgated red maples are usually selected for their consistent bright red fall color. If they are seed grown you might not get the bright red promised in the picture.

on a happy note, my red maple flowered on April Fool's Day!

: )

I was in Home Depot yesterday ang guess what I saw...
Acer Rubrum 'Red Scarlet'
Not to be confused with 'scarlet red'.
I doubt it's the same tree and I would be cautious about ordering from a company selling Paulownia/Empress Trees.
Not to mention, why pay $20+ shipping for a little whip when you can find a red maple just about anywhere. For about that price you can get a decent 7 gallon size.

My favorite two cultivars of Acer rubrum are:
'October Glory' and 'Brandywine'.

This nursery is a great deal. I've ordered several times and was very impressed with packaging and products.

Sooner Plant Farm (Link)

Here is a link that might be useful: Sooner Plant Farm - Click - Shade Trees

Thanks for the link to the Nursery. I have a FREE SHIPPING certificate from Fast Growing Trees that is why I am considering them. I will sign up for Sooner Plant Farm and see if they send me a free shipping certificate.. I find that if I sign up on Nursery email lists I get free shipping eventually.

Nursery promotional practices vary, same as the autumn color of red maple seedlings.