Obviously, each RSD theme differs visually but are there differences between them in the way they act or perform?
Maybe I'm asking if they can be classified in ways other than: this one is green with a red border and this one has flowers. Assuming there are differences, is there a place to see comparisons or categories by what they do or they they react or perform?
Thx

open RSD choose a theme when it loads go to
"preview on" or "live preview" choose a browser
There it is in your browser have a look see what it does & how it performs (some even have information within areas of the theme telling what & how it happens.
Back into RSD project play with it if you want (change settings/images whatever)
once finished with that theme, close RSD,
Open RSD again & repeat for any other theme

If you get one which you like & think you might be able to use,, SAVE AS (whatever name you like) there it is for you to open & start changing/adding anything
Wayan