Filters from my tractor 50 hour service. The blue one is the hydrostatic filter. The big one is the main hydraulic filter. The big one had a lot of debris in it. No anti drain back or pressure relief in either.
Same brand filters went back. Apparently there are issues with aftermarket on the big filter. Some people have reported issues with flow rate on certain implements. For the cost (~ 26 dollars), interval and how easy they are for me to get I have no issues using oem. if my dealer folds, then I might go on a hunt for a suitable replacement.