At my current skill level, it probably doesn't matter much lmao
It is pretty rare for it to make all that much difference at any level, and I have only rarely seen airplanes that did not fly acceptably well *just* because they were too heavy. Not unheard of, but not common. That's because of other, resolvable, problems with trim and power are far, far mode common. It's particularly bad because when someone weighs the airplane and they declare it "too heavy", they tend to give up on it, rather than make the changes necessary to get it working as well as possible.
Weight does make a difference at some point, but I have seen a lot of stunt contests, even the very biggest, won using airplanes that the typical Advanced flier would have long since discarded due to weight. This is particularly true since power has become unlimited.
There are still people who think they can determine how good the craftsmanship is by weighing it, so, there are certainly differing views. In my very recent experience, however, even I have to draw the line on some of the old kit wood - you can't have a 35-sized fuselage side that weighs an ounce and a half and has the consistency of red oak!
Brett