7 blade 17” fixed fan vs 6 blade 18” clutch fan

Oh, while it is cooling fine, it definitely seems like it could do better and since shroud is designed for 18” fan and car has a 17” fan now (was on it when bought it and I bought new shroud since it had none). In reading if the shroud and fan have too much gap it can be similar to running no shroud or at least greatly reduce the effect of the shroud.