Steering box

Hi, looking for a little advise on my steering box. It has a leak and a lot of play so bought a new adwest box part number ntc1580nor, however the box I received was a britpart box part number qaf500110. I'm not sure whether to fit this as I've had a lot of britpart parts fitted before and have had problems with the majority of them and had to replace within a short time period. Should I hold out for the adwest box or are these the same anyway? Thanks

I went for an Adwest....not interested in anything else but that's my personal choice....