Great question. Do you have specific examples to compare?

In SuiteSpare:GraphBLAS, it's generally recommended to avoid "GENERIC" operations, which can occur for many reasons. To see whether an operation is "GENERIC", enable the "burble" and look for "generic" in the printed diagnostic info. For example:

gb.ss.config["burble"]=True

However, generic operations shouldn't be an issue once the JIT comes in SuiteSparse:GraphBLAS 8.0 (coming soon!). Also, UDFs and UDTs are generally slower too.

Many of the operations used ingraphblas-algorithms were compared to alternatives and chosen b/c they are generally faster.

I don't know how to answer this question in general other than "benchmark and compare". It may be nice to gether recommendations here for specific operations.