This to me sounds like one of those little kids who keeps asking a new question before they have heard the answer to the previous question. Who is the tallest? Why? Who was the shortest? How short?
Viscaria, TB ALC, TB Spirit (and there are a few other Butterfly blades) have the same ply construction, the same thickness and are very close to the same. The main differences are the handle, the wings, and the shape of the blade face. Some say that the TB ALC (or both ALC and Spirit) have had a hardening process done to the top ply so they are slightly harder.
But, if you played with 10 of each, of varying weights, the ones that were closer in weight would feel more similar even though different blades, than the ones with weight differences. So, an 82 gram Viscaria compared to a 94 gram Viscaria will feel more different than an 82 gram Viscaria and an 82 gram TBSpirit or a 94 gram Vis compared to a 94 gram TBSpirit. Said differently, an 82 gram Vis and and 82 gram TBSpirit will feel closer to the same than either will feel to its 94 gram counterpart. However, all of them will feel like relatives, brothers, cousins.....
And it is worth noting, just a difference in the handle and the profile of the blade face would actually cause a big difference in how the blade felt to the person holding it.
As far as weight, this isn't for Viscarias from 2021, or from 2020 but from over the years. I have seen Viscarias that weighed as little as 79 grams. I have seen ones that weighed as much as 98 grams. This is because wood is a substance that once was alive. So, even if you have a wood that is the same kind of wood, cut in a sheet that is the same size and thickness, there will be decently large differences in weight.
For me, the Viscarias that I have felt that were under 86 grams felt like something was missing. To me they did not feel good. The ones that felt the best were between 89-93 grams. But I also like heavy blades. So what you like and what I like may be different.
Unfortunately, talking about equipment on the internet has a side to it that is a bit hollow and empty. I am not saying anything is wrong with it. But, too much thinking about things you don't have, and too much hearing other people trying to describe things they have or like, that you don't have, it can make you want something that, if you tried it, you may or may not like. But either way, equipment is not as important as practice. And the best way to try different equipment is to get the people you play with to let you try their gear; that works much better than reading what other people think on the internet.
In another thread you asked about an Avalox P-500 and another Avalox blade. Kong Linghui used the P-500 to win a WTTC singles title (World Championship). Back then it was a good blade. For me, it is still a good blade. The DHS Hurricane King, is very similar. After that WTTC win, Butterfly signed him and made a blade with Kong Linghui's name. It is the same plies and somewhat similar to the P-500. The old Stiga Offensive Classic (when it had a Koto top ply) was the the same plies and very similar also. The current Stiga Offensive Classic is not too different, but it has a Limba top ply, so, more like the blades Waldner used back then than the blades Kong Linghui used.
But any of those blades is also good. Back in the mid-90s, those would have been considered Off blades. These days they might be considered somewhere between All+ and Off- as a result of the changes in ball size and material that cause the ball to be slower (which, ironically has allowed TT companies to make faster blades and rubbers and allowed TT players to hit harder with less finesse and so, has actually caused TT to be faster in spite of the slower ball).
Choose a blade that is not too fast for you and STICK WITH ONE. The differences are not worth worrying about. If you use one blade with one set of rubbers consistently for several years, AND FOCUS ON TRAINING AND IMPROVING, rather than equipment, YOU WILL IMPROVE CONSIDERABLY MORE than if you try to focus on finding just the right equipment. Your game will develop around the equipment you choose provided you are not using something that is way too fast for you.
Interestingly, nothing bad would happen to your play skills if you used something too slow for you.