I’m using string because I actually find it easier to work with than ribbon or plastic strips. Plus my strainer, the design of which I believe dates to the early 30s, requires it. Sonically I don’t think it makes a lick of difference, but I only have two snares and one is amazing but one is crap. So don’t listen to me, folks.Again, and this depends on the wire design, pulling certain wires like this will tension the wires themselves more than applying tension of the wires against the head,. This issue can be less present depending on the break angle of the snare throw, snare wire end plate design, and snare bed but it can easily mitigated with string.
Either way, never use polyester film with snare wires- it has memory, it stretches, and generally isn't a great way to go.