Current stateWhich traits strongly describe your organization at this moment? Only make a check where you think "Yes, that's definitely a driving factor". The factors are split into "constraints" and "enablers". A Constraint reduces your potential level of agility, while enablers foster higher agility.
Many enablers would support a LeSS adoption, but the constraints need to be dealt with prior to introducing LeSS. SAFe, on the other hand, has been tailored to accomodate existing constraints and can be adopted even if there are few enablers present initially.