I cant do that.
I notice an immediate difference between rackets, especially swing weight, balance and feel. I cant tell much about the weight unless its really light or really heavy.
I have a really wristy swing so I do notice swing weight and balance almost instantly.
I have multiple rackets, but all but 1 or 2 are exactly the same setup. The 1 or 2 that arnt are usually strings im "testing". All my "match rackets" are exactly the same and I rotate through them to ensure even tension loss across all of them. I feel like I can tell... so I do it. Might just be in my mine, but w/e.
"In the 1980's two men dominated--sometimes each other, most of the time everyone else."