Not like it matters for Warhammer40000 who has the better technology. So, it's hard to say who has the better technology. Heavily-armored teleporting dudes with REALLY BIG HAMMERS and CLAWS THAT ARE FULL OF LIGHTNING who have guns that are so awesome they are like TWO GUNS PUT TOGETHER!!!.Almost every regiment in the Imperial Guard has amongst its ranks men and women. The primary role of a scout is to lead the way through arduous or hostile terrain and to advise his comrades how best to do so too. The only difference is that they get shittier equipment and come in more numbers. People who are VERY ANGRY ALL THE TIME!!! The Scout Squad of the Imperial Guard is similar to their Space Marine counterparts in terms of role.People full of FAITH IN THE EMPEROR!!!, which causes real miracles.Of course, also going purely by fluff, the Imperium has: Mercenaries who can handle the few things that their technology can't, namely those areas where Tau vehicles don't fare so well in.Even Crisis Suits, Broadsides and Hammerheads can take stealth as an option. Pathfinders inside stealthed Devilfishes can snipe with impunity, while stealth suits get in close and chew up large formations of infantry. And their targets can be designated by stealthed marker drones.