The Speedy is a fine watch, and Moonswatch did a good job capturing the look of the real think in a plastic package. It’s an attractive watch even if it’s clearly a toy version of it.
The true Fifty Fathoms is a very distinguished watch, but the Swatch FF looks like the worst kind of plastic McDonald’s toy imaginable, while also charging you even more money.
The Moonswatch is a meme but it is an attractive meme. The FF is a hideous meme.
If you look up “Vintage Omega Seamaster” on eBay you’ll find loads in your price range, vintage Seamasters are dirt cheap. Look for one 34-36mm and I think you’ll be set, AND it says Omega so you get hype points.