@jogar10
There is a significant difference.
For a Dropdown control, Dropdown1.Selected is a Record type, rather than the value itself that you see inside of the dropdown. A Record type will give an error when put into, say, the Text property of a Label field, but will work fine in the Items property of a Gallery. Technically, a Gallery is expecting a Collection (multiple records), rather than just a single record, but it will still accept even just a single Record. Here's an example:

Notice the above, which is the Text property of a Label - Dropdown1.Selected results in an error. The Text property of a Label, cannot be a Record. The Selected property, gives a Record.
On the other hand, putting it in a Gallery, works fine...

Not only that, but we can see in the formula bar, it's a record, specifically like this:
{Value:1}
On the other hand, Dropdown1.Selected.Value is not a Record type. It gives an error when put into, say, a Gallery's Items property, which expects a Collection or at least a Record - however, this one works fine in the Label's Text property.
Here's an example:

Notice Dropdown1.Selected.Value does not give a Record type, so this cannot be in the Items property of a Gallery and gives an error as shown above.
On the other hand,

on the Text property of a Label field, it works. You can also see that Dropdown1.Selected.Value gives a result of just 1 - rather than a Record of {Value:1}
So, there is a very significant difference between Dropdown.Selected and Dropdown.Selected.Value as you can see above.
See if it helps @jogar10