ScottHope:
We all know that the clubs we use accelerate as the meter progresses towards the ding, that rate of acceleration has to be calculated and that value isn't known to us, it's not listed in the pro shop. Different clubs accelerate at different rates.
Many people have posted about how clubs and balls with the same attributes, feel different. And it's those attributes that are not known to us that make these slight differences.
What I was meaning earlier, what Simon and others have said, suggests that replacing the Maverick pro with the apex pro irons, for example, is a waste of money.
People saying clubs and balls with the same attributes feel different is one thing, like people saying they experience VEM, but you're saying you've seen evidence.
I've no doubt what you say about there being differences is true and there are differences between sets of irons (for example). What was being talked about here is WGT's new clubs being direct replacements for ones that are taken away, this has been happening for over two years, do you know any case where any of the attributes (shown or hidden) are different between the old and replacement clubs?