Any thoughts on genuine versus aftermarket wiring harness?

BPUtah has the Genuine OEM harness for $163 (www.bputah.com)
Atlantic British has the aftermarket harness for $117.95 (Land Rover LR3 Trailer Wiring Kits (Fits Part# YWJ500220) - Land Rover LR3 Parts And Accessories)

I'm not towing more than a couple times a year (boat and trailers).

Also, Atlantic British has free shipping on orders over $250 until midnight. Do they usually have good sales and incentives? I'm in no rush, but it seems like a good deal for the harness plus I could get something else plus the free shipping.

Thanks gents (and ladies)!

 

the atlantic british one gets extensive testing. I should know I have helped them design other stuff in the past.

 

Okay, thanks. I figure with something like this it's a matter of simply using the correct gauge and quality wire so not too much to screw up. Plus they have nice instructions with pictures posted and even a YouTube.

 

...coming from a guy that has yet to see the truck he's just bought, are you kidding me, that LR doesn't come OEM with a harness? Are hitches extra, too?

Where are the parts places for these things if they aren't standard equipment?