Hi Dave,
Like you, I've not had any caerphilly except what I've made. I've not found anyone who sells the stuff made here on the south island. The "NZCheeseman" just told me about it one day while we were chatting and I mentioned caerphilly. He said he didn't stock it because it didn't last long enough, which I found strange, but then he explained that the version is a "made today sell tomorrow fresh cheese type thing", so I don't think it's similar to the Welsh version. When I gave him some of mine he said they were definitely different cheeses.
I generally make the Tim Smith version (with cheddaring) with a few tweaks here are there. I've made the one from 200 Easy Home as well, and the taste is similar between the two makes. My most recent one is based upon Peter Dixon's, which is a bit different again, so I'm quite interested to see how this one turns out.
I get a similar outcome to what you've described, nice fresh but not overpowering tang, texture like cheddar, and so forth. We must be doing something right if we're getting the same results!
- Jeff