Both work well. Shrimp adults and babies will feed off both. I use DIY sponge pre-filters on all my HOB intakes. This is also a great place to place shrimp food. The food with stick to the foam. The foam becomes the main feeding site. This helps keep the substrate cleaner.
I'm really happy with Aquarium Technology Inc (ATI) Filter Max I Pre-filter in my 20gal. It's on the intake of an Eheim 2213. It came with 5 assorted pieces and one fit the Eheim. Some might think it is too big - you might be able to find a smaller size
I ended up buying a sponge today and cut to fit on the end of my Biowheel 350. So far so good, shrimp were already inspecting haha... I'm still gonna try to make the other filter when I have time to get supplies and see how that works on another tank I have. Thanks for the info
The worst defeat in the world, is when you give up.