The data sheets spell it out??
http://www.cisco.com/en/US/prod/collateral/modules/ps2710/ps5494/product_data_sheet0900aecd802109ea_ps4324_Products_Data_Sheet.html
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps4324/data_sheet_c78-530856.html
http://www.cisco.com/en/US/prod/collateral/modules/ps2797/ps6033/product_data_sheet0900aecd801c5c66_ps4324_Products_Data_Sheet.html
Basicly, the Sup-6L-E has 10GE ports (like the Sup5-10GE), and the
chassis can do 24Gbps per slot instead of 6Gbps for a total of 320Gbps max
compared to 96Gbps max for a SupV (plain).