The rtw Formosa's look like the are bespoke. I've seen a customer of Greg's put the jacket on for the first time and it looked better than any jacket I had ever seen. If a rtw cut works for your body there is in fact no need for bespoke unless you're looking for something particular. I just wish I could fit into one those Formosa suits .
I popped in to Greg's warehouse and tried on a Formosa suit. It didn't fit me at all. I tried on a second one. Just as bad. I tried on a third one. Utter magic. Brilliant. Instant kop, and budget be damned.
They certainly are beautifully made. But that experience has taught me that buying suits online might be risky.