Miura's | Golf Monthly
Miura irons and wedges feel a little softer and 'heavier' (even though the itons aren't!). Miura wedges may well be a tiny amount overweight, to allow for grinding. If I was trying to compare either/both with other makes, I'd say Miura wedges feel and play similar to Vokeys (solid but white soft off the face), while Vegas are more like the older Clevelands or cast wedges (lighter and 'brighter' off the face). Same actually applies to irons, though a lt more of the feel seems to be through the particular shaft. I had KBS Tours in Vega Blades, Rifle 6.0 in Miura blade, S300s in Miura CB201s (felt dull!) which I swapped out replacing them with PX5.5s (much brighter feel but hard on my hands on links courses!).
I've had half a dozen sets of TM300s, which were forged by Miura, for Taylormade, just before he started up his own brand and currently have 2 sets of McGregor PCB Tours from a little earlier that are equivalent to CB301s. So i'm definitely a Miura iron fan! I would be happy playing Miura irons (well I do!) and Vega wedges as I prefer their 'bright' feel.
While Miura did do work for 'OEMs', Vega is actually the 'house brand' of forging house Kyoei which sells its heads (blanks) to anyone who will buy them. Lots of 'specialist' Japanes wedge makers use their heads as a base, as, I believe, does ICYGolf for his highly recommendable service! Cooper (in Scotland) certainly use Kyoei heads - their advertising blurb even featured the same pics as thet of KYoie/Vega last time I looked!
Hope that helps. If you want any more specific info, feel free to PM me.