RE: Which Plane is faster?
Maybe some new racing class is being created that requires these designs! How fast you fly with these types of planes is really pretty irrelevant. If these are your choices what else are you trying to get out of your flying experience other than speed? I would go for the Tiger or SSE from the standpoint that they fly good.
Also the original Tiger was the Sky tiger. This was basically a low wing Eagle 63 with a 63" wingspan (hence the name). The jr tiger was a .25 size version with around a 50" span which many put .40s on. You really cannot compare the jr. tiger with the Tiger 2 as the planes are significantly differant in size.
Again if you want to go fast, get a GP Viper for $120 or maybe a Lanier Shrike. With your engine and these airframes you will get over 120 mph if that is all that matters!