The Sinclair QL has not (at least not very much besides the general cost-savy technical design and the Microdrives) been influenced a lot by ZX Spectrum computers - It's rather the other way round: ZX Spectrum Plus and Toastrack did pick up the Dickinson design of the QL computer (For those not familiar with the timeline: The QL was the first Sinclair computer that used that "new", blocky design - Both Spectrum Plus and Spectrum 128 came after the QL).