Funny you should reference "marketing by Mizuno". Of all the major brands, Mizuno probably does the least amount of marketing. Hell they don't even have to pay pros to play them because they are that good. If you took away all the marketing dollars, most pros would be playing Mizuno and Titleist irons (just like in the 90's).I think all that marketing by Mizuno brain washed you. Compare apples to apples and it’s the same. Don’t compare forged face vs one piece forging. TM one piece forging clubs are P7MC and P7MB. Not easy to hit but feels like butter when you find the sweet spot.
I agree I am biased because I have played Mizuno forged irons since the early 90's. As mentioned, I've tried to move away several times but every time I try to pull the trigger, something just doesn't feel right/inconsistent shot dispersion. Unless your ability has dramatically changed (ex. handicap going way up or way down), sometimes it makes sense to stick with what you know. I know...I know...Mizuno is like a cult and I'm a member! 😃