This　paper　presents　a　comparative　study　of　a　gridshell　roof　structure　designed　for　the　Islamic　Cultural　Center　in　Dakar,　Senegal.　The　structure,　conceived　by　Fragomeli　&　Partners,　emulates　the　shape　of　a　dune　to　seamlessly　integrate　with　the　surrounding　environment.　To　define　an　optimal　structural　shape　while　preserving　the　architectural　intent,　two　form　-finding　methodologies　were　employed.　The　first　method,　the　Multibody　Rope　Approach　(MRA),　enables　the　calculation　of　the　funicular　structural　shape　in　response　to　the　imposed　load　configuration.　The　second　method,　Improved　MRA　(i-MRA),　introduces　slight　geometric　variations　to　the　funicular　shape　to　reduce　the　diversity　of　structural　elements　required　for　construction.　This　work　investigates　the　impact　of　the　geometric　distortions　introduced　by　i-MRA　on　structural　stability.　Linear　buckling　modal　analysis　has　been　conducted　on　the　two　generated　geometries,　taking　into　account　various　loading　conditions　and　structural　element　slenderness.　Through　incremental　load　Geometrical　Non-linear　with　Imperfection　Analyses　(GNIAs)　the　equilibrium　paths　are　examined　to　analyse　the　postbuckling　behaviour　of　the　gridshells.　In　the　final　step,　the　elastoplastic　constitutive　law　is　incorporated　to　assess　also　the　impact　of　material　non　-linearity.　The　models　are　examined　through　incremental　load　Geometrical　and　Material　Nonlinear　Analyses　(GMNIAs).　The　results　indicate　that　the　i-MRA　geometry　exhibits　a　more　even　stress　distribution　and　better　qualitative　postbuckling　behaviour.