Helix syn vs Euphro for beginner

Hey,
I’m a guy who struggle as a bottom (mostly stress and bad experiences which now cause panic and a feel of pain during the penetration).
After talking to many people I’ve decided to work on myself with a prostate massager, and I’ve heard that aneros are the best in the market.

The thing is, I’m not sure what to get. The website suggests the helix syn for beginners but someone in another subreddit told me that the Euphro might be better because it’s more slender and the beginning.

What do you think and recommend?

Thanks in advance 🙂