He's 6'5, faster than Hendo and dropping everyone. Gustaf's power is just as much a concern as Hendo's, I won't make up some random stats, be assured you don't want either guy to hit you clean.
I don't want anyone to hit me clean. But if I got to pick 1 of them to take a clean shot from, I'll be standing in the Gus line. When it comes down to just punching power, I got Hendo by a wide margin. I'm not saying that Gus isn't just as dangerous a striker or even a better striker. I just don't think he has Hendo level power. Not many do.