Just narrow it down to what you want to start with for your sim and then go from there. For me I want carrier ops and air combat, so I went with WOV. Also, keep in mind the newest patches for WOV take the code of the game up to the status of WOE, so basically your flying the same sim. But, if you want more advanced fighters and some more campaign, scenario stuff, go with WOE. They are both not very expensive, read reviews, look at screenshots, and get one! PS. Dont be afraid of SOME mods that say they only work in WOE. Onced your patched, they should work in WOV. AKA, I am running the F-14 Stike Tomcat in WOV with no problems even though the readme says it wont do in WOV alone...