As far as I know both the 6610-24 and the 6610-48 have the same number of 10GBe (8xSFP+, front accessible) and 40GBe (4xQSFP+, rear accessible, can be split into 4x10GBe using a fan out cable) ports, the difference only being the additional 24 1GBe RJ45 ports the -48 provides.
If you only need...