Always use the right tool for the job, good metric drivers will making working on your car much easier than trying to stuff the wrong wrench in.
Everyone saying that the difference is minimal are not correct, there is nothing close to 2mm hex in SAE.
Also the MIP wrenches are a very good fit and long lasting without being as expensive as the Hudy set. Integy wrenches may seem like a good deal right now but in the long run you will be better off with MIP/Hudy.