Well they do both have a bit of a downslope on the most common runway heading. But...
A lot of people use too high an approach speed in PA28s, many instructors seem to delight in teaching it, for reasons I'll never understand.
63kn for a -161 and 65kn for a -180 are the speeds at MAUW, they should come down a little at lower weights. I flew with one FAA instructor who insisted on 75kn until I nearly shoved the POH up her backside in annoyance (damned american used to 2000m concrete runways all the time.).
Stick with those and you shouldn't hit a problem - I speak as somebody used to landing a -161 at both Bembridge and Compton, which are both favourite lunch stops. (Oh for a Crab and Lobster seafood platter
)
G