You need to make a clean break! Get rid of the Perlicks all together! Don't look back!
I will PM you my address and help you along this quest. Throw 'em in a $12 flat rate USPS box and send 'em my may! I will pay shipping!
I for sure am OCD enough I would only ever want 1 brand/type of faucet for my 4 taps. I have the new style Perlick (non flow-control) and no springs. I have had zero issues ever. But I have heard about them for sure.
I did a keg of root beer once for my nephews, and had to replace ALL the interior gaskets. I bought spares, too.
I did try the Intertaps when they first came out- as I really thought the idea of interchangeable parts was cool. I took them back- I just did not like the feel compared to my Perlick. Also, The idea of a groove inside worries me- I know it is on the pour side, and cannot affect the keg of beer or really anything at all... but I don't know. Seems like an extra space for bad things to hide.
However- I would suggest someone here review the below- 2nd generation Intertaps! Very close to Perlick pricing though.
https://www.morebeer.com/products/nukatap-beer-faucet-stainless-steel.html?ref=1A