This should generate some traffic
The HEL ones, I believe until recently only had banjos whereas the Goodridge ones had OEM connectors. However, I think HEL have changed that now. There's been a couple of failed HEL threads in the last year I think on here but it's hard to say if any of that was down to installation or inferior product.
If I was buying again, I'd stump up for the Goodridge or Hosetechnik, having read a number of different views. Certainly, if you don't have trouble finding that bit of extra cash, spend a few quid extra.
All IMO, I have no dynos to prove anything