While I freely admit Surfer has no defenses against Hourmans powers, does anyone really think Hourman can take even one energy attack from Surfer? He wasn't known for his durability, and his fraction of the Warlogog was still dependant on creating his effects through time vision and such. No closing his eyes and willing mass changes to a timeline, as Extant could do.
At the least, it's a 50/50 shot since neither can defend against the others powers, but I'm still backing Surfer because of the speed edge.