Melling oil pumps M111 & M152

I read hours of internet stuff on oil pumps and never got the yes or no I wanted. A lot of people say M111 is the one to have for more oil pressure. I e-mailed a service tech at Melling and his reply to the difference in M111 & M152 was "The pumps use the same gerotor sets @1.570 thickness.

They use different bypass springs.

The M152 has a slightly higher bypass pressure.

I bought the M152 from Advance for $45 after promo code.