/technologies/fpga-group/b/blog/posts/difference-between-spartan-6-and-spartanSpartan 7 has 36 kb BRAM where as Spartan 6 has 18kb. Spartan 7 offers BRAM cascading to build bigger memories. Such features are not available in Spartan 6. Spartan 7 uses Soft memory controller for DDR support whereas Spartan 6 uses Hard memory conen-USTelligent Community 12