I went with SAM's because of the size of my pool. I was told the LED's are very good light quality but the intensity of the light is lower. So If I wanted to use LED's I needed to add 2 more lights. Since I already had 2 SAM's and 2SAL's I was not thrilled about the cost to add 2 more lights if I used LED's. The light color and intensity is very good with the SAM/SAL, I also had the Intellitouch controller so this allows for more functions like color swim. One negative for the SAM / SAL is that it has a mechanical light wheel inside that will eventually need to be serviced. I am happy with the performance.

I have a neighbor that just installed the Hayward LED in an existing pool and he is happy as well, but the shallow end of the pool is not very bright. Not an issue for him. If you do go with LED products make sure you have sufficient lights for the pool. I am sure either will work fine.