The blankets come in different weights because they come in different sizes.
The material is the same this is why the NRC ( noise reduction) is the same.

The NRC is tested for a material sample. The size of the sample for testing
must be standard, so any lab test has the same comparable results.

But in practical applications, the more sound absorbing material you put in
a room the more sound absorption you get. Of course that is provided that
surface of the material is exposed as much as possible to be able to absorb
the sound.
For example hanging blankets all around the room with 4-6 inches gap between
a reflective surfaced and the blanket is much more effective than having a
stuck of folded blankets in a corner.

Thank you

Jeff.

Yes, it will support the 80 x 96 blanket and even the 120 in long studio blankets.

The heavier the blanket, the more gentle you need to be sliding the blankets on the tracks.

More weight pits more pressure on the rollers and make it harder to roll on the tracks .

But statically track will support acoustic panels, no problem.

I think your best option is to use blankets with ceiling track kit.
Even better if you double wall the blankets with an air gap between layers.(use 2 circles of ceiling tracks, about 4-6 inches apart).
Hanging blanlets on thd track kit will allow you to slide the blankets out of the way , so you can have the use of the whole room if you need to
It will also allow you to manipulate the sound inside the room (more live or more dead).

You do not have to encircle the whole room with ceiling tracks.
You can use ceiling screw hooks (available from your local hardware store) and only use tracks where you want to divide the room.

This so allows you to create a “room within a room” without building an actual “room”. So you have more room for your other stuff.
😉

I would recommend comering walls eith blankets completely, even the walls you do not worry about.
You want to eliminate that percussion sound bouncing off the walls.
This will reduce overall sound level inside the room and therefore even less sound will escape.
If for your recording you feel the sound is too dead, you can slide open the blankets on tracks and allow some reflections to create a live sound.

Or you can just take blankets off the hooks.

There is also another option (alternative or additional, depends on how you want to hear your drums) .
You can wrap a blanket around a drum.
And let it (the rest of the blanket) lay on the floor.
This will drastically reduce the sound coming out of the drum.

Thank you.
Jeff.

All Producers choice sound blankets have the same acoustic quality with NRC 0.8 (80% noise reduction).
But they differ in size, color and grommets.
All even numbers (like VB70) have one side white, the other side black,
All odd numbers ( like VB71) have both sides black.
Letter “G” stands for “Grommets”. That means that if the blanket model has a letter “G” after the number, it has grommets pre-installed for easy hanging.
If there is no letter “G” that means the blanket is plain. No grommets.
The larger the number of the blanket the larger the blanket.
So 70 and 71 are 72 inch long.
72 and 73 are 96 inch long
76 and 77 are 120 inch long.
All blankets have the same width – 80 inches. This is the widest the loom can make.
The quilting is parallel. It is always runs starting from 80 inch side and gies along the length of the blanket.