New Deore brakes feel a lot like the previous year’s SLX.
The current SLX differs with XT by not having forged levers, a pad retaining screw, free-stroke adjustment (pointless to me) and ice-tech pads. The calipers are the same, the SLX come with a split pin but have the thread for a proper screw and the level blade is unlikely to be much more than aesthetics unless you’re into DH perhaps? German prices mean the price difference is little between the 2, UK prices are quite different. I’d buy German XT for a main bike, Deore for a 2nd bike.
Rose bikes is another option, google their facebook discount code and you can get 10% off.