High-nuclear heterometallic 3d-4f coordination clusters have attracted much attention of worldwide scientists because they display fascinating magnetic phenomena such as single-molecule magnet behavior (SMM), macroscopic quantum tunneling of magnetization, quantum phase interface and quantum coherence [1-3]. These entire properties are crucial for materials to function as quantum bits (qubits).  In continuation of our research on the design and synthesis of 3d-4f compounds [1-3] a new heterometallic nonanuclear [Fe6Dy3(is)9(bdea)6(MeO)6]∙MeOH (1) wheel-type cluster has been prepared that can be transformed to the condensed undecanuclear [Fe7Dy4O4(OH)3(is)9.25(bdea)6(NO3)0.75(H2O)] (2) cluster (bdeaH2 = N-butyldiethanolamine; isH2 = isobutyric acid). Cluster 1 crystallizes in the triclinic space group P-1 with a = 18.424(3), b = 19.448(3), c = 20.301(3) Å, α = 102.016(2), ß = 108.799(2), γ = 110.864(2)°, Z = 2, V = 5990.2(14) Å3, while 2 in the monoclinic space group P21/c with a = 17.0512(5), b = 18.7764(3), c = 36.6927(11) Å, ß = 92.347(3)°, Z = 4, V = 11737.7(5) Å3. The core of 1 comprises six FeIII ions and three DyIII ions that are linked by nine bridging isobutyrates, six aminoalcohol ligands and six methoxy groups forming an almost perfect ring-type structure, whereby two adjacent FeIII ions interleave with DyIII ions, as shown in Figure 1. The core of cluster 2 consists of seven FeIII ions and four DyIII ions bound via four μ4‒O and three μ3‒OH groups, six isobutyrates and six N-butyldiethanolamine ligands forming a globe-like structure (Figure 1). The spectroscopic, thermal and magnetic properties of 1 and 2 have also been studied and will be discussed in terms of known structures. Note, the remarkable conversion of a {Fe6Dy3} wheel-like complex to a condensed {Fe7Dy4} globe-type complex leads to an enhancement from 3.6 K up to 12 K of the out–of–phase magnetic susceptibility χmʺ signals in these aggregates at zero bias field.