I have owned a bunch of each.
The main difference is the handle shape and length (TB-ALC handle is a little longer, more square). TB-ALC on average is a little harder, I think because they do something to the outer ply, maybe UV light, that makes it slightly harder. On average (meaning if you examine several examples of each blade) you would not say that one model is systematically faster than another. Of course if you compared just one of each you could easily decide that one is faster than another (hence a lot of confusion and arguing about this on threads from people who have only ever tried one of each), but if you compare two Viscarias you might well conclude the same thing. These things are made of wood, each model comes in a weight range, and no two are identical. Some people say that Viscaria has a "better feel". I agree, at least most of the time, but I would be unable to tell you what I even mean by that, and so it is a pretty useless statement. Who knows if you feel things the way I do or would like the same thing?
Don't get one that is too light, for either one, they lose a lot of what makes them good if they are much below, say, 86 grams, and they are at their best right around 90-92. A lot of the newest ones are in that weight range and I think they are excellent. Light Viscaria blades tend to be more head-heavy (the weight loss is usually carved out of the handle I think) and that is less of an issue for TB-ALC because the handle is slightly longer.
The handle that works best for your game maybe should be the deciding factor. Viscaria only comes in FL, TB-ALC comes in ST also. It is definitely more squared and the wings are a little different. So your preference may depend a bit on your grip, how high or low you like to hold the paddle, how much you change your grip from FH to BH, and things like that. Only way to know is to hold them and kind of get a feeling for it that way, or better yet, hit with a clubmate's blade if possible.
Oh one last thing. Words like "control" are like "feel". Pretty much meaningless (or mean different things to different people). Control of what? Something that helps with one shot may be worse for another. Or do we just mean slower? But I can say this, there is no obvious advantage of one over the other in my experience in terms of being able to play short game, serve, or return.
Also, if you are lucky you will get one (of either model) that is truly amazing, but given sufficient weight, you will almost never get one (of either model) that is bad. They are meant for the same kind of player. Timo Boll started his career with Viscaria.