Welcome to AoS. I’m a very new member here myself. I am the owner of a Net modified 33/303 though they are not being used at the moment.
The difference between them and the original is very large. In a nutshell, the sound is more “modern” which not everyone likes of course. More dynamics, more energetic.
However my understanding is that David Pritchard, the man behind Net, died a couple of years ago. I was considering getting a second 303 modified and bi-amping them but my e-mails to Net a year or so ago went unanswered. Someone may have taken the business over however.
I may consider selling them but at the moment they are on standby duty.
Good luck.

Richard A