In my opinion, no they’re not. ReelMagik isn’t bad, though I find most STPs are the same whether they’re $50 or $500 because they’re all designed the same way with the cup that goes over your entire anatomy. Unless there’s something you don’t like about your current STP, I wouldn’t go spending a ton of money on something.
Depending on what you already have, and you want something more realistic, I would highly recommend YourWillieShop. Though, if you’ve never used a medicine spoon type of product, it’s something to get used to. Though, I found it easier to use than the alternative designs.
The other thing is most of the more expensive STPs are usually 3-in-1’s which I find are too big to pack with if you’re going to be using them on a daily basis, and can be awkward to position so it doesn’t look like you’ve got a boner.
If you’re interested in getting a prosthetic for play, I would suggest getting a good one you feel comfortable with for packing and peeing, and a separate one for play.