The most desired Cat6 cable is multi strand,
Actually, the most desired cable isn't multi-strand. Not exactly...
Here's the science bit... (well, the engineering bit)
Ethernet cable comes in both varieties - multi-strand and single-strand, but always with twisted pairs.
The multi-strand variety is used where flexibility is required - so is invariably seen in patch cables. Consumers usually see this kind of cable because they tend to plug computers into routers directly, using this kind of cable. Consumers don't yet have comms rooms in their houses, with racks of RJ45 ports.
The single-strand, or solid, variety is nowhere near as flexible (as well as being hard to crimp connectors onto), so isn't used for patch cables but is used for in-building cabling within walls, ceilings and floors, with the cables routing back to racks. When you see an ethernet connector in a wall, it will usually be wired at the back with solid cable, which tends to use push-fit auto-strip krone connectors.
Both types should offer the same noise rejection because of the twists. However, multi-strand patch cable loses more signal because it has a higher attenuation.
The difference in capability is seen in the specs for Ethernet itself. Multi-strand patch cable is only recommended for a maximum of 30 metres. Ethernet itself allows for a maximum distance of 100 metres, with 90 metres of solid-core plus 5m of flexible multi-core at either end.
So the most desirable cable for keeping the signal intact is actually the solid core one, because it gives you the least attenuation loss. However, it isn't the most desirable in all circumstances, such as when you want flexibility.
Those arguments are all based on Cat 6 (or cat 5 or 5e) carrying ethernet, but they don't really change when you stick a slightly different connector on and carry DSL signals instead.