I would think the Eliminator w/ more HP & a lighter Eng package would be faster. Maybe it's not proped for top end. You won't be disappointed w/ the Ilmor power. I've owned 2 boats w/ twins.
I've never owned an Eliminator or a Talon but am much more familiar w/ the Eliminators. My guess is the Talon will appeal to a more limited resale market w/ potential buyers facing the same questions you are posing today.
Also whats the $$$ diff between the 2 boats? I'm thinking the 1yr newer Eliminator w/ a 625 would bring more money both now & later.