Just as a very general guideline, the Spendors are more in line with the vast majority of loudspeakers out there from B&W, Joseph Audio, PSB, slim towers with two and half way designs incorporating two 6.5 inch drivers and a tweeter. There are many variations of this same basic design.Sure they all have different flavors but what they do well is shared by all of them-imaging, soundstage, and midrange.
The Orangutan's are a whole different animal, a variation of the old Snell Type A and the Audionote AE line. The Orangutans are going to appeal to the listener who wants something different from the norm. The presentation is different than most other loudspeakers.
Do you order Cabernet with your steak frites or do you look for unknown Poulsard based gems from the Jura? It is kind of like that.