Original sentence: No definitive speed comparison has been reported, but an unspecified faster startup time together with a small speedup (1.7%) has been reported.There is a bigger speed advantage of Opera and Konqueror over Firefox, than Swiftfox over Firefox
Edited sentence: A faster startup was reported, but no actual numbers.Also a small speedup of 0.12 of a second (1.7% ) improvement in page rendering has been reported.No definitive benchmarking has been reported