A sublet allows direct landlord communication with the subtenant, unlike a sublease, where the legal relationship is between the primary and subtenant. In contrast, subletting is when the landlord creates a new rental agreement with a new party.A sublet is when you temporarily rent out your apartment to someone else while you are still the primary tenant on the lease. One key difference between subletting and subleasing lies in the nature of the landlordtenant relationship. We talk about a sublease when the original tenant (sublessor) rents out all or some of the space to a third party (sublessee). â–« sublease arrangements (terms under which the tenant may rent the apartment to someone else);. The tenant gets credit for the interest for all months in which the rent is paid on time (within the grace period that is set up in the lease). The tenant would be the sublessor and the third party would be the sublessee. The landlord may only increase the rent at the beginning of the term of the lease. Notice of Termination.